New: Regression for Intel Corporation Device a876 (rev 10)
https://bugzilla.kernel.org/show_bug.cgi?id=221637
Bug ID: 221637
Summary: Regression for Intel Corporation Device a876 (rev 10)
Product: Drivers
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Bluetooth
Assignee: [email protected]
Reporter: [email protected]
Regression: NoOn my Dell Pro 14 Premium PA14250, the Bluetooth works with the firmware version 20260309, but it regressed to not-working in 20260410 and it has not been fixed as of 20260519. (Speculation: The firmware is crashing.) Via lspci, the Bluetooth device is:
00:14.7 Bluetooth: Intel Corporation Device a876 (rev 10)
Two sample outputs of dmesg (first working, second not-working, both on NixOS with the only configuration difference being the firmware override):
Kernel 7.0.11, Firmware 20260309 $ sudo dmesg | grep -i bluetooth
[ 13.782762] Bluetooth: Core ver 2.22 [ 13.782883] NET: Registered PF_BLUETOOTH protocol family [ 13.782884] Bluetooth: HCI device and connection manager initialized [ 13.782886] Bluetooth: HCI socket layer initialized [ 13.782888] Bluetooth: L2CAP socket layer initialized [ 13.782892] Bluetooth: SCO socket layer initialized [ 13.805444] Bluetooth: hci0: Device revision is 0 [ 13.805449] Bluetooth: hci0: Secure boot is enabled [ 13.805450] Bluetooth: hci0: OTP lock is disabled [ 13.805450] Bluetooth: hci0: API lock is enabled [ 13.805451] Bluetooth: hci0: Debug lock is disabled [ 13.805452] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 13.805453] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 13.806042] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 13.806046] Bluetooth: hci0: Boot Address: 0x30098800 [ 13.806046] Bluetooth: hci0: Firmware Version: 15-3.26 [ 13.860697] Bluetooth: hci0: Waiting for firmware download to complete [ 13.860704] Bluetooth: hci0: Firmware loaded in 53377 usecs [ 13.863006] Bluetooth: hci0: Waiting for device to boot [ 13.863023] Bluetooth: hci0: Device booted in 2254 usecs [ 13.863024] Bluetooth: hci0: Waiting for device transition to d0 [ 13.863025] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 13.863191] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 13.866100] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 13.866112] Bluetooth: hci0: Boot Address: 0x10000800 [ 13.866113] Bluetooth: hci0: Firmware Version: 15-3.26 [ 14.395735] Bluetooth: hci0: Waiting for firmware download to complete [ 14.395763] Bluetooth: hci0: Firmware loaded in 517244 usecs [ 14.433393] Bluetooth: hci0: Received gp1 mailbox interrupt [ 14.433452] Bluetooth: hci0: Waiting for device to boot [ 14.433861] Bluetooth: hci0: Device booted in 37190 usecs [ 14.433862] Bluetooth: hci0: Waiting for device transition to d0 [ 14.433980] Bluetooth: hci0: Device moved to D0 in 115 usecs [ 14.437701] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0190-0291-pci.ddc [ 14.437877] Bluetooth: hci0: Applying Intel DDC parameters completed [ 14.438188] Bluetooth: hci0: Firmware timestamp 2026.3 buildtype 1 build 9743 [ 14.438190] Bluetooth: hci0: Firmware SHA1: 0xd68504ef [ 14.438460] Bluetooth: hci0: Fseq status: Success (0x00) [ 14.438463] Bluetooth: hci0: Fseq executed: 00.00.04.202 [ 14.438464] Bluetooth: hci0: Fseq BT Top: 00.00.04.202 [ 15.814470] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 15.814476] Bluetooth: BNEP socket layer initialized [ 15.815604] Bluetooth: MGMT ver 1.23 [ 28.005710] Bluetooth: RFCOMM TTY layer initialized [ 28.005717] Bluetooth: RFCOMM socket layer initialized [ 28.005719] Bluetooth: RFCOMM ver 1.11
Kernel 7.0.11, Firmware 20260519 $ sudo dmesg | grep -i bluetooth
[ 11.552083] Bluetooth: Core ver 2.22 [ 11.552591] NET: Registered PF_BLUETOOTH protocol family [ 11.552593] Bluetooth: HCI device and connection manager initialized [ 11.552596] Bluetooth: HCI socket layer initialized [ 11.552598] Bluetooth: L2CAP socket layer initialized [ 11.552600] Bluetooth: SCO socket layer initialized [ 11.586234] Bluetooth: hci0: Device revision is 0 [ 11.586239] Bluetooth: hci0: Secure boot is enabled [ 11.586239] Bluetooth: hci0: OTP lock is disabled [ 11.586240] Bluetooth: hci0: API lock is enabled [ 11.586240] Bluetooth: hci0: Debug lock is disabled [ 11.586241] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 11.586242] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 11.587640] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 11.587646] Bluetooth: hci0: Boot Address: 0x30098800 [ 11.587646] Bluetooth: hci0: Firmware Version: 99-13.26 [ 11.647652] Bluetooth: hci0: Waiting for firmware download to complete [ 11.647659] Bluetooth: hci0: Firmware loaded in 58608 usecs [ 11.649893] Bluetooth: hci0: Waiting for device to boot [ 11.649927] Bluetooth: hci0: Device booted in 2205 usecs [ 11.649927] Bluetooth: hci0: Waiting for device transition to d0 [ 11.649928] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 11.650058] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 11.653394] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 11.653410] Bluetooth: hci0: Boot Address: 0x10000800 [ 11.653411] Bluetooth: hci0: Firmware Version: 99-13.26 [ 11.890541] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.891227] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.909517] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.932472] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.932823] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.937740] Bluetooth: hci0: Received gp1 mailbox interrupt [ 11.938063] Bluetooth: hci0: Received gp1 mailbox interrupt [ 12.229448] Bluetooth: hci0: Waiting for firmware download to complete [ 12.229468] Bluetooth: hci0: Firmware loaded in 562566 usecs [ 12.264949] Bluetooth: hci0: Received gp1 mailbox interrupt [ 12.264978] Bluetooth: hci0: Controller in error state [ 13.444947] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 13.444957] Bluetooth: BNEP socket layer initialized [ 15.238165] Bluetooth: hci0: Timeout (3000 ms) on alive interrupt, alive context: intel_reset1 [ 15.238170] Bluetooth: hci0: Failed to send frame (-62) [ 15.238171] Bluetooth: hci0: sending frame failed (-62) [ 15.238199] Bluetooth: hci0: Failed to send Intel Reset command [ 15.238208] Bluetooth: hci0: Intel Soft Reset failed (-62) [ 15.238211] Bluetooth: hci0: Firmware download retry count: 1 [ 15.277649] Bluetooth: hci0: Device revision is 0 [ 15.277650] Bluetooth: hci0: Secure boot is enabled [ 15.277651] Bluetooth: hci0: OTP lock is disabled [ 15.277651] Bluetooth: hci0: API lock is enabled [ 15.277652] Bluetooth: hci0: Debug lock is disabled [ 15.277652] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 15.277653] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 15.277855] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 15.277856] Bluetooth: hci0: Boot Address: 0x30098800 [ 15.277857] Bluetooth: hci0: Firmware Version: 99-13.26 [ 15.331235] Bluetooth: hci0: Waiting for firmware download to complete [ 15.331248] Bluetooth: hci0: Firmware loaded in 52141 usecs [ 15.333516] Bluetooth: hci0: Waiting for device to boot [ 15.333518] Bluetooth: hci0: Device booted in 2200 usecs [ 15.333519] Bluetooth: hci0: Waiting for device transition to d0 [ 15.333519] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 15.333705] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 15.336014] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 15.336025] Bluetooth: hci0: Boot Address: 0x10000800 [ 15.336026] Bluetooth: hci0: Firmware Version: 99-13.26 [ 15.354944] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.381773] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.436473] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.437607] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.478120] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.479335] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.483759] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.487062] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.490408] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.500570] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.506638] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.506756] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.515964] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.517688] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.517933] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.532163] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.532282] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.635134] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.636578] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.636707] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.638224] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.638413] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.642802] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.643026] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.704576] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.704711] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.710823] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.734369] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.734563] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.753238] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.756902] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.757166] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.779988] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.780134] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.782630] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.782757] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.792866] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.952898] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.953061] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.956667] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.957829] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.957963] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.960131] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.960433] Bluetooth: hci0: Received gp1 mailbox interrupt [ 15.986218] Bluetooth: hci0: Waiting for firmware download to complete [ 15.986223] Bluetooth: hci0: Firmware loaded in 634965 usecs [ 16.021756] Bluetooth: hci0: Received gp1 mailbox interrupt [ 16.021778] Bluetooth: hci0: Controller in error state [ 19.013291] Bluetooth: hci0: Timeout (3000 ms) on alive interrupt, alive context: intel_reset1 [ 19.013304] Bluetooth: hci0: Failed to send frame (-62) [ 19.013307] Bluetooth: hci0: sending frame failed (-62) [ 19.013333] Bluetooth: hci0: Failed to send Intel Reset command [ 19.013359] Bluetooth: hci0: Intel Soft Reset failed (-62)
Regression originally reported downstream:
https://github.com/NixOS/nixpkgs/issues/530344
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
https://bugzilla.kernel.org/show_bug.cgi?id=221637
Bianca Fürstenau ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Regression|No |Yes
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
Pierre-Olivier Vallès ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #1 from Pierre-Olivier Vallès ([email protected]) --- FYI, same bug on same hardware was also reported downstream here:
https://gitlab.archlinux.org/archlinux/packaging/packages/linux-firmware/-/work_items/45
From https://gitlab.com/kernel-firmware/linux-firmware.git:
commit 99a2479f94e13da021288b016ec55243ac31fae5 (2026-01-16): works commit ed10eae8facb3b4bf2da7104cec95afdf0209114 (2026-03-13): fails commit 7df47664dd1d94111858b3224c15908517c73e73 (2026-04-23): fails
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #2 from Pierre-Olivier Vallès ([email protected]) --- I added in CC one of the author of the last 2 commits.
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #3 from Pierre-Olivier Vallès ([email protected]) --- Author of commit ed10eae8facb3b4bf2da7104cec95afdf0209114 is [email protected] but there are no corresponding bugzilla.kernel.org account.
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
Paul Menzel ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pmenzel+bugzilla.kernel.org
| |@molgen.mpg.de--- Comment #4 from Paul Menzel ([email protected]) --- I also commented on the [Linux firmware merge request](https://gitlab.com/kernel-firmware/linux-firmware/-/merge_requests/955).
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #5 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) --- This bugzilla is likely the wrong place for this and most other bugs.
Last time it iirc was a mail CCed to the linux-firmware maintainers that got things rolling:
https://lore.kernel.org/all/[email protected]/
Ideally someone affected would do that (please CC me) -- while specifying the exact commit that needs to be reverted.
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #6 from Paul Menzel ([email protected]) --- Bianca sent a message to the mailing list: [REGRESSION] Intel Corporation Device a876 (rev 10) firmware crashes since ed10eae8 [1].
[1]:
https://lore.kernel.org/all/[email protected]/
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
Kiran ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #7 from Kiran ([email protected]) ---
Hi Biance, Paul,
Appreciate if you can test and feedback with the below patch.
Seeing the error pattern in dmesg, appears like the issue has been fixed already and the patch is present in bluetooth-next,
Thanks,
Kiran
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #8 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) --- Krian:
Quoted 1 line
the below patch.
FWIW a quick reminder, "[…] updated firmware files must not cause any regressions for users of older kernel releases." -- that is a quote from
https://docs.kernel.org/driver-api/firmware/firmware-usage-guidelines.html
So fixing this with a kernel patch is nice, but by kernel standards this from what I see still qualifies as a regression where the firmware change needs to be reverted to avoid the problem.
That being said: if we assume that this is a corner case that only Bianca and maybe one or two others hits, then using a patch is fine if it's fine for the affected people. Is that the case?
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #9 from Bianca Fürstenau ([email protected]) --- I applied the patch and it mostly worked.
Quick note: I was unable to figure out how to non-manually get a patch file from the googlesource site and this incurred several hours of delay while I did something else before I had the idea of trying to find the patch on kernel.org:
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/patch/?id=5917dd39db2bfc8b1b4c6ea8ed99adb4badef707
When I applied the patch to 7.0.11, the Bluetooth worked with the current firmware and the dmesg logs looked the same as with the old firmware except for timings and version identifiers. When I applied the patch to 7.0.12, the Bluetooth still worked but there were a lot of gp1 mailbox interrupts and new warnings in the dmesg logs. This seems unexpected to me, but if it seems expected to Kiran et al., I do not have any further issue with this. If it seems unexpected to you, too, it might warrant further investigation.
Am I seeing correctly that the patch is already in 7.1.0? If so, it seems unnecessary to revert anything for me as my understanding of the release strategy of NixOS for the configuration I am running is that my next kernel will be 7.1.0 anyway. If I am wrong about that, the consequence is only that applying updates takes me an hour instead of a few minutes at most if one of the updates was to the kernel. Definitely quite annoying, but also not terribly prohibitive, as the device stays usable during the update process. (Still, nothing I would look forward to doing a dozen times until 7.2.0 releases or something.)
Linux 7.0.11 with 5917dd39, Firmware 20260519 $ sudo dmesg | grep -i bluetooth
[ 31.058834] Bluetooth: Core ver 2.22 [ 31.058854] NET: Registered PF_BLUETOOTH protocol family [ 31.058855] Bluetooth: HCI device and connection manager initialized [ 31.058860] Bluetooth: HCI socket layer initialized [ 31.058862] Bluetooth: L2CAP socket layer initialized [ 31.058864] Bluetooth: SCO socket layer initialized [ 31.085847] Bluetooth: hci0: Device revision is 0 [ 31.085852] Bluetooth: hci0: Secure boot is enabled [ 31.085854] Bluetooth: hci0: OTP lock is disabled [ 31.085855] Bluetooth: hci0: API lock is enabled [ 31.085855] Bluetooth: hci0: Debug lock is disabled [ 31.085856] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 31.085858] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 31.086590] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 31.086594] Bluetooth: hci0: Boot Address: 0x30098800 [ 31.086595] Bluetooth: hci0: Firmware Version: 99-13.26 [ 31.142382] Bluetooth: hci0: Waiting for firmware download to complete [ 31.142386] Bluetooth: hci0: Firmware loaded in 54485 usecs [ 31.144680] Bluetooth: hci0: Waiting for device to boot [ 31.144682] Bluetooth: hci0: Device booted in 2235 usecs [ 31.144683] Bluetooth: hci0: Waiting for device transition to d0 [ 31.144683] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 31.144815] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 31.148426] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 31.148435] Bluetooth: hci0: Boot Address: 0x10000800 [ 31.148436] Bluetooth: hci0: Firmware Version: 99-13.26 [ 31.684955] Bluetooth: hci0: Waiting for firmware download to complete [ 31.684977] Bluetooth: hci0: Firmware loaded in 523972 usecs [ 31.721113] Bluetooth: hci0: Received gp1 mailbox interrupt [ 31.721318] Bluetooth: hci0: Waiting for device to boot [ 31.721770] Bluetooth: hci0: Device booted in 35918 usecs [ 31.721773] Bluetooth: hci0: Waiting for device transition to d0 [ 31.721837] Bluetooth: hci0: Device moved to D0 in 61 usecs [ 31.722508] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0190-0291-pci.ddc [ 31.722682] Bluetooth: hci0: Applying Intel DDC parameters completed [ 31.723019] Bluetooth: hci0: Firmware timestamp 2026.13 buildtype 1 build 117603 [ 31.723022] Bluetooth: hci0: Firmware SHA1: 0xde043160 [ 31.723308] Bluetooth: hci0: Fseq status: Success (0x00) [ 31.723311] Bluetooth: hci0: Fseq executed: 00.00.04.202 [ 31.723312] Bluetooth: hci0: Fseq BT Top: 00.00.04.202 [ 33.048540] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 33.048544] Bluetooth: BNEP socket layer initialized [ 33.049844] Bluetooth: MGMT ver 1.23 [ 43.952601] Bluetooth: RFCOMM TTY layer initialized [ 43.952611] Bluetooth: RFCOMM socket layer initialized [ 43.952613] Bluetooth: RFCOMM ver 1.11
Linux 7.0.12 with 5917dd39, Firmware 20260519 $ sudo dmesg | grep -i bluetooth
[ 235.299907] Bluetooth: Core ver 2.22 [ 235.299924] NET: Registered PF_BLUETOOTH protocol family [ 235.299925] Bluetooth: HCI device and connection manager initialized [ 235.299929] Bluetooth: HCI socket layer initialized [ 235.299932] Bluetooth: L2CAP socket layer initialized [ 235.299935] Bluetooth: SCO socket layer initialized [ 235.340849] Bluetooth: hci0: Device revision is 0 [ 235.340854] Bluetooth: hci0: Secure boot is enabled [ 235.340854] Bluetooth: hci0: OTP lock is disabled [ 235.340855] Bluetooth: hci0: API lock is enabled [ 235.340855] Bluetooth: hci0: Debug lock is disabled [ 235.340856] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 235.340857] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 235.341842] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 235.341845] Bluetooth: hci0: Boot Address: 0x30098800 [ 235.341846] Bluetooth: hci0: Firmware Version: 99-13.26 [ 235.403312] Bluetooth: hci0: Waiting for firmware download to complete [ 235.403315] Bluetooth: hci0: Firmware loaded in 60029 usecs [ 235.405554] Bluetooth: hci0: Waiting for device to boot [ 235.405579] Bluetooth: hci0: Device booted in 2206 usecs [ 235.405580] Bluetooth: hci0: Waiting for device transition to d0 [ 235.405580] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 235.405731] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 235.408475] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 235.408482] Bluetooth: hci0: Boot Address: 0x10000800 [ 235.408482] Bluetooth: hci0: Firmware Version: 99-13.26 [ 235.653214] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.653367] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.653539] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.653673] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.654661] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.654798] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.654998] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.655161] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.656670] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.656790] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.676405] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.676593] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.680410] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.680540] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.680908] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.681047] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.684592] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.684693] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.684817] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.684924] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.685464] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.685583] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.685708] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.685831] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.689008] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.689155] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.690617] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.690721] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.694404] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.694523] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.694671] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.694785] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.695897] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.696005] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.696186] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.696299] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.699381] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.699483] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.701368] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.701469] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.702431] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.702535] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.703859] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.703953] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.704123] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.704230] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.704426] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.704528] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.704714] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.704803] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.705816] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.705899] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.706020] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.706147] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.706801] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.706905] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.710379] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.710481] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.710639] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.710747] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.716898] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.717012] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.718284] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.718378] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.718593] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.718679] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.719490] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.719575] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.719732] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.719816] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.721102] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.721200] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.721444] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.721541] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.723024] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.723163] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.724594] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.724685] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.725061] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.725141] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.725816] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.725918] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.878235] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.878324] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.878449] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.878530] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.885430] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.885514] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.886566] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.886633] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.886755] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.886847] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.914645] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.914746] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 235.963268] Bluetooth: hci0: Waiting for firmware download to complete [ 235.963274] Bluetooth: hci0: Firmware loaded in 541794 usecs [ 235.999442] Bluetooth: hci0: Received gp1 mailbox interrupt [ 235.999526] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db100f) [ 235.999536] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db100f) [ 235.999659] Bluetooth: hci0: Waiting for device to boot [ 236.000092] Bluetooth: hci0: Device booted in 35942 usecs [ 236.000093] Bluetooth: hci0: Waiting for device transition to d0 [ 236.000158] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1007) [ 236.000162] Bluetooth: hci0: Device moved to D0 in 67 usecs [ 236.001511] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0190-0291-pci.ddc [ 236.001689] Bluetooth: hci0: Applying Intel DDC parameters completed [ 236.002010] Bluetooth: hci0: Firmware timestamp 2026.13 buildtype 1 build 117603 [ 236.002012] Bluetooth: hci0: Firmware SHA1: 0xde043160 [ 236.002292] Bluetooth: hci0: Fseq status: Success (0x00) [ 236.002293] Bluetooth: hci0: Fseq executed: 00.00.04.202 [ 236.002294] Bluetooth: hci0: Fseq BT Top: 00.00.04.202 [ 236.035455] Bluetooth: hci0: Controller device warning (boot_stage: 0xa09b1047) [ 237.596110] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 237.596115] Bluetooth: BNEP socket layer initialized [ 237.598181] Bluetooth: MGMT ver 1.23 [ 250.315840] Bluetooth: RFCOMM TTY layer initialized [ 250.315848] Bluetooth: RFCOMM socket layer initialized [ 250.315852] Bluetooth: RFCOMM ver 1.11
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[Bug 221637] Regression for Intel Corporation Device a876 (rev 10)
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221637
--- Comment #10 from Pierre-Olivier Vallès ([email protected]) --- Hi,
Testing with kernel 7.1.2 and firmware snapshot from 22nd of June (no patch applied).
Bluetooth device initialises correctly and is able to connect to other bt devices (i.e. it works)
Still a lot of "Controller device warning (boot_stage: 0xa0db1003) / Received gp1 mailbox interrupt" messages that we were not getting before.
$ uname -a Linux x9.lan 7.1.2-arch3-1 #1 SMP PREEMPT_DYNAMIC Fri, 03 Jul 2026 23:25:36 +0000 x86_64 GNU/Linux
$ pacman -Ss firmware-intel
core/linux-firmware-intel 20260622-1 [installed]
Firmware files for Linux - Firmware for Intel devices$ sudo dmesg | grep -i bluetooth [ 1.242709] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 4.378750] Bluetooth: Core ver 2.22 [ 4.379233] NET: Registered PF_BLUETOOTH protocol family [ 4.379235] Bluetooth: HCI device and connection manager initialized [ 4.379237] Bluetooth: HCI socket layer initialized [ 4.379239] Bluetooth: L2CAP socket layer initialized [ 4.379241] Bluetooth: SCO socket layer initialized [ 4.575746] Bluetooth: hci0: Device revision is 0 [ 4.575750] Bluetooth: hci0: Secure boot is enabled [ 4.575751] Bluetooth: hci0: OTP lock is disabled [ 4.575752] Bluetooth: hci0: API lock is enabled [ 4.575753] Bluetooth: hci0: Debug lock is disabled [ 4.575754] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 4.575756] Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995 [ 4.576600] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi [ 4.576610] Bluetooth: hci0: Boot Address: 0x30098800 [ 4.576613] Bluetooth: hci0: Firmware Version: 226-18.26 [ 4.634683] Bluetooth: hci0: Waiting for firmware download to complete [ 4.634696] Bluetooth: hci0: Firmware loaded in 56727 usecs [ 4.636984] Bluetooth: hci0: Waiting for device to boot [ 4.636987] Bluetooth: hci0: Device booted in 2220 usecs [ 4.636988] Bluetooth: hci0: Waiting for device transition to d0 [ 4.636988] Bluetooth: hci0: Device moved to D0 in 0 usecs [ 4.637349] Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b [ 4.642013] Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi [ 4.642028] Bluetooth: hci0: Boot Address: 0x10000800 [ 4.642030] Bluetooth: hci0: Firmware Version: 226-18.26 [ 4.654455] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.654463] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.654579] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.654582] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.678664] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.678672] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.697607] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.697611] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.699227] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.699230] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.699337] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.699339] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.704360] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.704363] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.717723] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.717738] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.777761] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.777765] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.790000] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.790031] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.790164] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.790166] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.837888] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.837891] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.838006] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.838008] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.841254] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.841257] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.841371] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.841374] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 4.841568] Bluetooth: hci0: Received gp1 mailbox interrupt [ 4.841570] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.048448] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.048453] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.048575] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.048578] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.056405] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.056409] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.056848] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.056855] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.056983] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.056985] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.078245] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.078250] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.098366] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.098390] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.098840] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.098843] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.098964] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.098974] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.101319] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.101322] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.115473] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.115477] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.115598] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.115601] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.117916] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.117918] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.118068] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.118070] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.118370] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.118372] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.118604] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.118606] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.122275] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.122299] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.136938] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.136950] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.137130] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.137132] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.139425] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.139430] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1003) [ 5.215958] Bluetooth: hci0: Waiting for firmware download to complete [ 5.215966] Bluetooth: hci0: Firmware loaded in 560493 usecs [ 5.251217] Bluetooth: hci0: Received gp1 mailbox interrupt [ 5.251229] Bluetooth: hci0: Controller device warning (boot_stage: 0xa09b100f) [ 5.251241] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db100f) [ 5.251285] Bluetooth: hci0: Waiting for device to boot [ 5.251883] Bluetooth: hci0: Device booted in 35062 usecs [ 5.251885] Bluetooth: hci0: Waiting for device transition to d0 [ 5.251946] Bluetooth: hci0: Controller device warning (boot_stage: 0xa0db1007) [ 5.251948] Bluetooth: hci0: Device moved to D0 in 62 usecs [ 5.252133] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0190-0291-pci.ddc [ 5.252344] Bluetooth: hci0: Applying Intel DDC parameters completed [ 5.252737] Bluetooth: hci0: Firmware timestamp 2026.18 buildtype 1 build 120290 [ 5.252739] Bluetooth: hci0: Firmware SHA1: 0x38841b2b [ 5.253077] Bluetooth: hci0: Fseq status: Success (0x00) [ 5.253078] Bluetooth: hci0: Fseq executed: 00.00.04.202 [ 5.253078] Bluetooth: hci0: Fseq BT Top: 00.00.04.202 [ 5.286003] Bluetooth: hci0: Controller device warning (boot_stage: 0xa09b1047) [ 5.357344] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5.357346] Bluetooth: BNEP filters: protocol multicast [ 5.357349] Bluetooth: BNEP socket layer initialized [ 5.358431] Bluetooth: MGMT ver 1.23 [ 9.755544] Bluetooth: RFCOMM TTY layer initialized [ 9.755567] Bluetooth: RFCOMM socket layer initialized [ 9.755573] Bluetooth: RFCOMM ver 1.11
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