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

[bugzilla-daemon@kernel.org]

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

--- Comment #2 from The Linux kernel's regression tracker (Thorsten Leemhuis) (regressions@leemhuis.info) ---
[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

On 7/4/26 17:41, bugzilla-daemon@kernel.org 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: drivers_usb@kernel-bugs.kernel.org
>           Reporter: marx.tomasz@gmail.com
>         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 <torvalds@linux-foundation.org>
> 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 <hurryman2212@gmail.com>
> 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.
>

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