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New: prom21-xhci does not allow to use USB keyboard in plymouth

Bug 221721 [email protected] 3 participants 14 messages Jul 4 – Jul 13

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author
#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

Signature · 4 lines
You may reply to this email to add a comment.

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#2 lore raw
In reply to [email protected]

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 50 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

#3 lore raw

Hi,

One of the very first thing discussed during the review process of prom21-xhci commits was about correct loading of the module during initramfs stage.

It was mainly about writing correct dependencies in Kconfig for USB host controller build.

config USB_XHCI_PCI_PROM21

	tristate
	depends on USB_XHCI_PCI
	default USB_XHCI_PCI if SENSORS_PROM21_XHCI != n
	select AUXILIARY_BUS

Maybe it was not enough? Can you perhaps check whether both xhci_pci and xhci_pci_prom21 are loaded at the plymouth stage?

I also do use OPAL LUKS with dracut, but my setup uses TPM2 to auto unlock it. I will check the manual keyboard input during dracut initramfs LUKS unlock stage.

Sincerely,
Jihong Min

Quoted 66 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 50 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

#4 lore raw
In reply to Thorsten Leemhuis

With a little more of thinking, I think this happens due to the initramfs building tool not including xhci-pci-prom21.ko when xhci-pci.ko is built with the Kconfig where USB_XHCI_PCI_PROM21 was enabled.

Can you check your initramfs file for whether it holds xhci-pci-prom21.ko correctly, or not?

For example, with dracut, you can do something like:
cat <<'EOF' | sudo tee /etc/dracut.conf.d/10-xhci-pci-prom21.conf # PROM21 xHCI PCI glue is needed before root/LUKS unlock when xhci-pci is modular.
force_drivers+=" xhci-pci-prom21 "
EOF

Sincerely,
Jihong Min

Quoted 66 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 50 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

#5 lore raw

Hi,

PR for Dracut-ng is now submitted:
https://github.com/dracut-ng/dracut/pull/2491

Sincerely,
Jihong Min

Quoted 87 lines · Jihong Min

With a little more of thinking, I think this happens due to the initramfs building tool not including xhci-pci-prom21.ko when xhci-pci.ko is built with the Kconfig where USB_XHCI_PCI_PROM21 was enabled.

Can you check your initramfs file for whether it holds xhci-pci-prom21.ko correctly, or not?

For example, with dracut, you can do something like:
cat <<'EOF' | sudo tee /etc/dracut.conf.d/10-xhci-pci-prom21.conf # PROM21 xHCI PCI glue is needed before root/LUKS unlock when xhci-pci is modular.
force_drivers+=" xhci-pci-prom21 "
EOF

Sincerely,
Jihong Min

Quoted 66 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 50 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

author
#6 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #2 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) --- [Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 51 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use
my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

Signature · 4 lines
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.
author
#7 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #3 from [email protected] ---
Hi,

One of the very first thing discussed during the review process of prom21-xhci commits was about correct loading of the module during initramfs stage.

It was mainly about writing correct dependencies in Kconfig for USB host controller build.

config USB_XHCI_PCI_PROM21
tristate
depends on USB_XHCI_PCI
default USB_XHCI_PCI if SENSORS_PROM21_XHCI != n select AUXILIARY_BUS

Maybe it was not enough? Can you perhaps check whether both xhci_pci and xhci_pci_prom21 are loaded at the plymouth stage?

I also do use OPAL LUKS with dracut, but my setup uses TPM2 to auto unlock it. I will check the manual keyboard input during dracut initramfs LUKS unlock stage.

Sincerely,
Jihong Min

Quoted 68 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 52 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs
and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use
my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

Signature · 4 lines
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.
author
#8 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #4 from [email protected] ---
With a little more of thinking, I think this happens due to the initramfs building tool not including xhci-pci-prom21.ko when xhci-pci.ko is built with the Kconfig where USB_XHCI_PCI_PROM21 was enabled.

Can you check your initramfs file for whether it holds xhci-pci-prom21.ko correctly, or not?

For example, with dracut, you can do something like:
cat <<'EOF' | sudo tee /etc/dracut.conf.d/10-xhci-pci-prom21.conf # PROM21 xHCI PCI glue is needed before root/LUKS unlock when xhci-pci is modular.
force_drivers+=" xhci-pci-prom21 "
EOF

Sincerely,
Jihong Min

Quoted 68 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 52 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I tried both of my USB keyboards, but both of them just briefly lit up the LEDs
and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use
my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

Signature · 4 lines
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.
author
#9 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #5 from [email protected] ---
Hi,

PR for Dracut-ng is now submitted:
https://github.com/dracut-ng/dracut/pull/2491

Sincerely,
Jihong Min

Quoted 90 lines · Jihong Min

With a little more of thinking, I think this happens due to the initramfs building tool not including xhci-pci-prom21.ko when xhci-pci.ko is built with the Kconfig where USB_XHCI_PCI_PROM21 was enabled.

Can you check your initramfs file for whether it holds xhci-pci-prom21.ko correctly, or not?

For example, with dracut, you can do something like:
cat <<'EOF' | sudo tee /etc/dracut.conf.d/10-xhci-pci-prom21.conf # PROM21 xHCI PCI glue is needed before root/LUKS unlock when xhci-pci is modular.
force_drivers+=" xhci-pci-prom21 "
EOF

Sincerely,
Jihong Min

Quoted 69 lines · Thorsten Leemhuis

[Switching to email, hope this will work]

Jihong Min, it seems a recent change of yours is causing trouble. See below for details.

Side note, but not my area of expertise, so feel free to ignore this, as I might be sending people in the wrong direction and it's just a hunch
anyway: wonder if this is another of those situations where the driver needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m when things were broken? And if yes: have you tried if adding it to the initramfs or setting SENSORS_PROM21_XHCI=y helps?

Ciao, Thorsten

Quoted 53 lines · On 7/4/26 17:41, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=221721

            Bug ID: 221721
           Summary: prom21-xhci does not allow to use USB keyboard in
                    plymouth
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 310416
--> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit
output of "sudo lsusb -v"

Hi,

After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I
tried both of my USB keyboards, but both of them just briefly lit up the LEDs
and then seemed to turn off. Bisection pointed to

commit 364f4a55c661641c02c86a849f0608d8fc3c0006
Merge: e4b4bfaa5090 1c2b66a7d725
Author: Linus Torvalds <[email protected]>
Date: Mon Jun 22 12:09:47 2026 -0700

    Merge tag 'usb-7.2-rc1' of

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

and then

commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD)

Author: Jihong Min <[email protected]>
Date:   Tue May 19 09:07:31 2026 +0900

usb: xhci-pci: add AMD Promontory 21 PCI glue

After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use
my PC normally.

CPU: AMD Ryzen 9 9900X
Motherboard: X870I AORUS PRO ICE
Output of "lsusb -v" provided in attachment.

Signature · 4 lines
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#10 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #6 from Tomasz ([email protected]) ---
Hi, with "xhci-pci-prom21" module added to initrd, plymouth now works. Should I close this ticket?

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#11 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

Jihong Min ([email protected]) changed:

What |Removed |Added
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CC| |[email protected]

--- Comment #7 from Jihong Min ([email protected]) --- (In reply to Tomasz from comment #6)

Quoted 2 lines

Hi, with "xhci-pci-prom21" module added to initrd, plymouth now works. Should I close this ticket?

Hi,

Which initrd building tool are you using? I may end up doing PR to that as well.

Sincerely,
Jihong Min

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#12 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) changed:

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CC| |[email protected]

--- Comment #8 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) ---

Quoted 1 line

I may end up doing PR to that as well.

Well, fixing this is nice, but do you plan to fix this on the kernel level, too? This is maybe a borderline thing wrt to the "no regressions" rule, but still would be nice to prevent problems for users that do update their kernels without updating their initramfs tool.

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#13 lore raw

[Bug 221721] prom21-xhci does not allow to use USB keyboard in plymouth

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=221721

--- Comment #9 from Jihong Min ([email protected]) ---
(In reply to The Linux kernel's regression tracker (Thorsten Leemhuis) from comment #8)

Quoted 6 lines
Quoted 1 line

I may end up doing PR to that as well.

Well, fixing this is nice, but do you plan to fix this on the kernel level, too? This is maybe a borderline thing wrt to the "no regressions" rule, but still would be nice to prevent problems for users that do update their kernels without updating their initramfs tool.

Currently, there is no plan to address this in the kernel.

During the patch review series, it was concluded to implement this in the Renesas way, which does not "pollute" the generic "xhci-pci.c", and requires the very same approach (initramfs building tools must address this issue to explicitly include xhci-pci-prom21 same as xhci-pci-renesas (for dracut), or "correctly" detects the module tree for system-available devices in so called "dep" or "hostonly" mode (it seems dracut fails in this point but others look better in the handling routine).

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