Regression on drm/i915, with bisected commit

PATCH Éric Brunet 5 participants 8 messages May 16, 2023 – Jun 5, 2023

Subsystems (6)

Stable branch DRM drivers DRM misc Intel i915 +2 more subsystems

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Éric Brunet

author

2023-05-16 14:07 UTC #0 lore raw

Hello all,

I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.

After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.

I checked that vanilla 6.2.12 does not have the bug and that both vanilla 6.2.13 and vanilla 6.3.2 do have the bug.

I bisected the problem to commit e2b789bc3dc34edc87ffb85634967d24ed351acb (it is a one-liner reproduced at the end of this message).

I checked that vanilla 6.3.2 with this commit reverted does not have the bug.

I am CC-ing every e-mail appearing in this commit , I hope this is ok, and I apologize if it is not.

I have filled a fedora bug report about this, see https://bugzilla.redhat.com/
show_bug.cgi?id=2203549 . You will find there a small video (made with fedora kernel 2.6.14) demonstrating the issue.

Some more details:

% sudo lspci -vk -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] (rev 0c) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company Device 896d
Flags: bus master, fast devsel, latency 0, IRQ 143
Memory at 603c000000 (64-bit, non-prefetchable) [size=16M] Memory at 4000000000 (64-bit, prefetchable) [size=256M] I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
Capabilities: [320] Single Root I/O Virtualization (SR-IOV) Kernel driver in use: i915
Kernel modules: i915

Relevant kernel boot messages: (appart from timestamps, these lines are identical for 6.2.12 and 6.2.14):

[    2.790043] i915 0000:00:02.0: vgaarb: deactivate vga console
[    2.790089] i915 0000:00:02.0: [drm] Using Transparent Hugepages
[    2.790497] i915 0000:00:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.793812] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/
adlp_dmc_ver2_16.bin (v2.16)
[    2.825058] i915 0000:00:02.0: [drm] GuC firmware i915/adlp_guc_70.bin 
version 70.5.1
[    2.825061] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc.bin version 
7.9.3
[    2.842906] i915 0000:00:02.0: [drm] HuC authenticated
[    2.843778] i915 0000:00:02.0: [drm] GuC submission enabled
[    2.843779] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    2.844200] i915 0000:00:02.0: [drm] GuC RC: enabled
[    2.845010] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected 
content support initialized
[    3.964766] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 
1
[    3.968403] ACPI: video: Video Device [GFX0] (multi-head: yes  rom: no  
post: no)
[    3.968981] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/
PNP0A08:00/LNXVIDEO:00/input/input18
[    3.977892] fbcon: i915drmfb (fb0) is primary device
[    3.977899] fbcon: Deferring console take-over
[    3.977904] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[    4.026120] i915 0000:00:02.0: [drm] Selective fetch area calculation

failed in pipe A

Is there anything else I should provide? I am willing to run some tests, of course.

Thanks for your help,

Éric Brunet

=================================================

commit e2b789bc3dc34edc87ffb85634967d24ed351acb (HEAD)

Author: Ville Syrjälä <[email protected]>
Date:   Wed Mar 29 20:24:33 2023 +0300

drm/i915: Fix fast wake AUX sync len

commit e1c71f8f918047ce822dc19b42ab1261ed259fd1 upstream.

Fast wake should use 8 SYNC pulses for the preamble and 10-16 SYNC pulses for the precharge. Reduce our fast wake SYNC count to match the maximum value. We also use the maximum precharge length for normal AUX transactions.

Cc [email protected]

Cc Jouni Högander <[email protected]>

Signed-off-by Ville Syrjälä <[email protected]>

Link https://patchwork.freedesktop.org/patch/msgid/

[email protected]

Reviewed-by Jouni Högander <[email protected]>

(cherry picked from commit 605f7c73133341d4b762cbd9a22174cc22d4c38b)

Signed-off-by Jani Nikula <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

drivers/gpu/drm/ renamed from drivers/gpu/drm/i915/display/intel_dp_aux.c +0 -0

i915/display/intel_dp_aux.c
index 664bebdecea7..d5fed2eb66d2 100644

drivers/gpu/drm/i915/display/intel_dp_aux.c +1 -1

@@ -166,7 +166,7 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
              DP_AUX_CH_CTL_TIME_OUT_MAX |
              DP_AUX_CH_CTL_RECEIVE_ERROR |
              (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
-             DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
+             DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(24) |
              DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
 
        if (intel_tc_port_in_tbt_alt_mode(dig_port))

Bagas Sanjaya

2023-05-17 00:01 UTC #1 lore raw

Quoted 10 lines · Éric Brunet

Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.

Quoted 8 lines

I checked that vanilla 6.2.12 does not have the bug and that both vanilla 6.2.13 and vanilla 6.3.2 do have the bug.
I bisected the problem to commit e2b789bc3dc34edc87ffb85634967d24ed351acb (it is a one-liner reproduced at the end of this message).
I checked that vanilla 6.3.2 with this commit reverted does not have the bug.

Can you also check that its mainline counterpart (e1c71f8f918047c) also exhibits this regression?

Quoted 59 lines

I am CC-ing every e-mail appearing in this commit , I hope this is ok, and I apologize if it is not.
I have filled a fedora bug report about this, see https://bugzilla.redhat.com/
show_bug.cgi?id=2203549 . You will find there a small video (made with fedora kernel 2.6.14) demonstrating the issue.
Some more details:
% sudo lspci -vk -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] (rev 0c) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company Device 896d
Flags: bus master, fast devsel, latency 0, IRQ 143
Memory at 603c000000 (64-bit, non-prefetchable) [size=16M] Memory at 4000000000 (64-bit, prefetchable) [size=256M] I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
Capabilities: [320] Single Root I/O Virtualization (SR-IOV) Kernel driver in use: i915
Kernel modules: i915
Relevant kernel boot messages: (appart from timestamps, these lines are identical for 6.2.12 and 6.2.14):
[    2.790043] i915 0000:00:02.0: vgaarb: deactivate vga console
[    2.790089] i915 0000:00:02.0: [drm] Using Transparent Hugepages
[    2.790497] i915 0000:00:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.793812] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/
adlp_dmc_ver2_16.bin (v2.16)
[    2.825058] i915 0000:00:02.0: [drm] GuC firmware i915/adlp_guc_70.bin 
version 70.5.1
[    2.825061] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc.bin version 
7.9.3
[    2.842906] i915 0000:00:02.0: [drm] HuC authenticated
[    2.843778] i915 0000:00:02.0: [drm] GuC submission enabled
[    2.843779] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    2.844200] i915 0000:00:02.0: [drm] GuC RC: enabled
[    2.845010] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected 
content support initialized
[    3.964766] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 
1
[    3.968403] ACPI: video: Video Device [GFX0] (multi-head: yes  rom: no  
post: no)
[    3.968981] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/
PNP0A08:00/LNXVIDEO:00/input/input18
[    3.977892] fbcon: i915drmfb (fb0) is primary device
[    3.977899] fbcon: Deferring console take-over
[    3.977904] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[    4.026120] i915 0000:00:02.0: [drm] Selective fetch area calculation 

Quoted 5 lines

failed in pipe A
Is there anything else I should provide? I am willing to run some tests, of course.

Anyway, thanks for regression report. I'm adding it to regzbot:

#regzbot ^introduced: e2b789bc3dc34ed
#regzbot title: Selective fetch area calculation regression on Alder Lake card #regzbot link: https://bugzilla.redhat.com/show_bug.cgi?id=2203549

Signature · 1 line

An old man doll... just what I always wanted! - Clara

Hogander, Jouni

2023-05-17 09:21 UTC #2 lore raw

Hello,

Quoted 23 lines · Bagas Sanjaya

Quoted 22 lines · Éric Brunet
Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler
Lake intel video card.
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing
severe video glitches made of random pixels in a vertical band occupying about
20% of my screen, on the right. The glitches would happen both with X.org and
wayland.
I checked that vanilla 6.2.12 does not have the bug and that both vanilla
6.2.13 and vanilla 6.3.2 do have the bug.
I bisected the problem to commit e2b789bc3dc34edc87ffb85634967d24ed351acb (it is a one-liner reproduced at the end of this message).

Quoted 87 lines

Quoted 3 lines
I checked that vanilla 6.3.2 with this commit reverted does not have the bug.
Can you also check that its mainline counterpart (e1c71f8f918047c) also
exhibits this regression?
Quoted 79 lines
I am CC-ing every e-mail appearing in this commit , I hope this is ok, and I
apologize if it is not.
I have filled a fedora bug report about this, see
https://bugzilla.redhat.com/
show_bug.cgi?id=2203549 . You will find there a small video (made with fedora
kernel 2.6.14) demonstrating the issue.
Some more details:
% sudo lspci -vk -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-UP3 GT2 [Iris
Xe Graphics] (rev 0c) (prog-if 00 [VGA controller])
        DeviceName: Onboard IGD
        Subsystem: Hewlett-Packard Company Device 896d
        Flags: bus master, fast devsel, latency 0, IRQ 143 Memory at 603c000000 (64-bit, non-prefetchable) [size=16M] Memory at 4000000000 (64-bit, prefetchable) [size=256M] I/O ports at 3000 [size=64]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: [40] Vendor Specific Information: Len=0c <?>
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [100] Process Address Space ID (PASID)
        Capabilities: [200] Address Translation Service (ATS)
        Capabilities: [300] Page Request Interface (PRI)
        Capabilities: [320] Single Root I/O Virtualization (SR-IOV) Kernel driver in use: i915
        Kernel modules: i915
Relevant kernel boot messages: (appart from timestamps, these lines are
identical for 6.2.12 and 6.2.14):
[    2.790043] i915 0000:00:02.0: vgaarb: deactivate vga console [    2.790089] i915 0000:00:02.0: [drm] Using Transparent Hugepages [    2.790497] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.793812] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/
adlp_dmc_ver2_16.bin (v2.16)
[    2.825058] i915 0000:00:02.0: [drm] GuC firmware i915/adlp_guc_70.bin
version 70.5.1
[    2.825061] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc.bin version
7.9.3
[    2.842906] i915 0000:00:02.0: [drm] HuC authenticated [    2.843778] i915 0000:00:02.0: [drm] GuC submission enabled [    2.843779] i915 0000:00:02.0: [drm] GuC SLPC enabled [    2.844200] i915 0000:00:02.0: [drm] GuC RC: enabled [    2.845010] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected
content support initialized
[    3.964766] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor
1
[    3.968403] ACPI: video: Video Device [GFX0] (multi-head: yes
rom: no
post: no)
[    3.968981] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/ PNP0A08:00/LNXVIDEO:00/input/input18
[    3.977892] fbcon: i915drmfb (fb0) is primary device [    3.977899] fbcon: Deferring console take-over
[    3.977904] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[    4.026120] i915 0000:00:02.0: [drm] Selective fetch area calculation
failed in pipe A
Is there anything else I should provide? I am willing to run some tests, of
course.

Couple of experiment you could do:

Try disabling PSR completely by adding "i915.enable_psr=0" into your kernel parameters

if this helps on your issue remove "i915.enable_psr=0" from kernel parameters and try using more loose PSR latency configuration by adding "i915.psr_safest_params=1" into your command line parameters.

Thank You in advance,

Jouni Högander

Quoted 9 lines

Quoted 1 line
Anyway, thanks for regression report. I'm adding it to regzbot:
#regzbot ^introduced: e2b789bc3dc34ed
#regzbot title: Selective fetch area calculation regression on Alder Lake card
#regzbot link: https://bugzilla.redhat.com/show_bug.cgi?id=2203549

Bagas Sanjaya

2023-05-18 13:12 UTC #3 lore raw

In reply to Bagas Sanjaya

Quoted 11 lines · Bagas Sanjaya

Quoted 10 lines · Éric Brunet
Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.

Quoted 8 lines

Quoted 8 lines
I checked that vanilla 6.2.12 does not have the bug and that both vanilla 6.2.13 and vanilla 6.3.2 do have the bug.
I bisected the problem to commit e2b789bc3dc34edc87ffb85634967d24ed351acb (it is a one-liner reproduced at the end of this message).
I checked that vanilla 6.3.2 with this commit reverted does not have the bug.

There is a similar regression reported on freedesktop gitlab tracker (by different reporter):

#regzbot link: https://gitlab.freedesktop.org/drm/intel/-/issues/8475

Signature · 1 line

An old man doll... just what I always wanted! - Clara

Linux regression tracking #update (Thorsten Leemhuis)

2023-06-05 11:05 UTC #4 lore raw

In reply to Bagas Sanjaya

Quoted 5 lines · Bagas Sanjaya

Quoted 4 lines · Éric Brunet
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.

Quoted 8 lines

Quoted 4 lines
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.
[...]
#regzbot ^introduced: e2b789bc3dc34ed
#regzbot title: Selective fetch area calculation regression on Alder Lake card #regzbot link: https://bugzilla.redhat.com/show_bug.cgi?id=2203549

#regzbot fix: drm/i915: Use 18 fast wake AUX sync len #regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) --
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
That page also explains what to do if mails like this annoy you.

Ville Syrjälä

2023-05-17 20:32 UTC #5 lore raw

In reply to Éric Brunet

Quoted 13 lines · Éric Brunet

Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.
I checked that vanilla 6.2.12 does not have the bug and that both vanilla 6.2.13 and vanilla 6.3.2 do have the bug.

Quoted 7 lines

I bisected the problem to commit e2b789bc3dc34edc87ffb85634967d24ed351acb (it is a one-liner reproduced at the end of this message).
I checked that vanilla 6.3.2 with this commit reverted does not have the bug.
I am CC-ing every e-mail appearing in this commit , I hope this is ok, and I apologize if it is not.

Please file a bug at https://gitlab.freedesktop.org/drm/intel/issues/new
boot with "log_buf_len=4M drm.debug=0xe" passed to kernel cmdline, and attach the resulting dmesg to the bug.

Quoted 107 lines

I have filled a fedora bug report about this, see https://bugzilla.redhat.com/
show_bug.cgi?id=2203549 . You will find there a small video (made with fedora kernel 2.6.14) demonstrating the issue.
Some more details:
% sudo lspci -vk -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] (rev 0c) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company Device 896d
Flags: bus master, fast devsel, latency 0, IRQ 143
Memory at 603c000000 (64-bit, non-prefetchable) [size=16M] Memory at 4000000000 (64-bit, prefetchable) [size=256M] I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
Capabilities: [320] Single Root I/O Virtualization (SR-IOV) Kernel driver in use: i915
Kernel modules: i915
Relevant kernel boot messages: (appart from timestamps, these lines are identical for 6.2.12 and 6.2.14):
[    2.790043] i915 0000:00:02.0: vgaarb: deactivate vga console
[    2.790089] i915 0000:00:02.0: [drm] Using Transparent Hugepages
[    2.790497] i915 0000:00:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.793812] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/
adlp_dmc_ver2_16.bin (v2.16)
[    2.825058] i915 0000:00:02.0: [drm] GuC firmware i915/adlp_guc_70.bin 
version 70.5.1
[    2.825061] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc.bin version 
7.9.3
[    2.842906] i915 0000:00:02.0: [drm] HuC authenticated
[    2.843778] i915 0000:00:02.0: [drm] GuC submission enabled
[    2.843779] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    2.844200] i915 0000:00:02.0: [drm] GuC RC: enabled
[    2.845010] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected 
content support initialized
[    3.964766] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 
1
[    3.968403] ACPI: video: Video Device [GFX0] (multi-head: yes  rom: no  
post: no)
[    3.968981] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/
PNP0A08:00/LNXVIDEO:00/input/input18
[    3.977892] fbcon: i915drmfb (fb0) is primary device
[    3.977899] fbcon: Deferring console take-over
[    3.977904] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[    4.026120] i915 0000:00:02.0: [drm] Selective fetch area calculation 
failed in pipe A
Is there anything else I should provide? I am willing to run some tests, of course.
Thanks for your help,
Éric Brunet
=================================================
commit e2b789bc3dc34edc87ffb85634967d24ed351acb (HEAD)
Author: Ville Syrjälä <[email protected]>
Date:   Wed Mar 29 20:24:33 2023 +0300
drm/i915: Fix fast wake AUX sync len
commit e1c71f8f918047ce822dc19b42ab1261ed259fd1 upstream.
Fast wake should use 8 SYNC pulses for the preamble and 10-16 SYNC pulses for the precharge. Reduce our fast wake SYNC count to match the maximum value. We also use the maximum precharge length for normal AUX transactions.
Cc [email protected]
Cc Jouni Högander <[email protected]>
Signed-off-by Ville Syrjälä <[email protected]>
Link https://patchwork.freedesktop.org/patch/msgid/
[email protected]
Reviewed-by Jouni Högander <[email protected]>
(cherry picked from commit 605f7c73133341d4b762cbd9a22174cc22d4c38b)
Signed-off-by Jani Nikula <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
drivers/gpu/drm/ renamed from drivers/gpu/drm/i915/display/intel_dp_aux.c +0 -0
i915/display/intel_dp_aux.c
index 664bebdecea7..d5fed2eb66d2 100644
drivers/gpu/drm/i915/display/intel_dp_aux.c +1 -1
@@ -166,7 +166,7 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
              DP_AUX_CH_CTL_TIME_OUT_MAX |
              DP_AUX_CH_CTL_RECEIVE_ERROR |
              (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
-             DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
+             DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(24) |
              DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
 
        if (intel_tc_port_in_tbt_alt_mode(dig_port))

Signature · 2 lines

Ville Syrjälä
Intel

Éric Brunet

author

2023-05-18 08:15 UTC #6 lore raw

Quoted 6 lines · Le mercredi 17 mai 2023, 22:32:42 CEST Ville Syrjälä a écrit :

Quoted 5 lines · Éric Brunet
Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.

Quoted 8 lines

Quoted 4 lines
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.
Please file a bug at https://gitlab.freedesktop.org/drm/intel/issues/new
boot with "log_buf_len=4M drm.debug=0xe" passed to kernel cmdline, and attach the resulting dmesg to the bug.

Thank you for your answer, I have just opened the issue as requested.

https://gitlab.freedesktop.org/drm/intel/-/issues/8480

Éric Brunet

Bagas Sanjaya

2023-05-18 13:31 UTC #7 lore raw

Quoted 12 lines · Éric Brunet

Quoted 11 lines · Le mercredi 17 mai 2023, 22:32:42 CEST Ville Syrjälä a écrit :
Quoted 9 lines · Éric Brunet
Hello all,
I have a HP Elite x360 1049 G9 2-in-1 notebook running fedora 38 with an Adler Lake intel video card.
After upgrading to kernel 6.2.13 (as packaged by fedora), I started seeing severe video glitches made of random pixels in a vertical band occupying about 20% of my screen, on the right. The glitches would happen both with X.org and wayland.

Quoted 8 lines

Quoted 3 lines
Please file a bug at https://gitlab.freedesktop.org/drm/intel/issues/new
boot with "log_buf_len=4M drm.debug=0xe" passed to kernel cmdline, and attach the resulting dmesg to the bug.
Thank you for your answer, I have just opened the issue as requested.
https://gitlab.freedesktop.org/drm/intel/-/issues/8480

Thanks for the ticket link. Now telling regzbot (and updating the culprit since you also mention the mainline commit that I assume to be the culprit [please verify if it is indeed the case]):

#regzbot introduced: e1c71f8f918047
#regzbot link: https://gitlab.freedesktop.org/drm/intel/-/issues/8480

Signature · 1 line

An old man doll... just what I always wanted! - Clara