Hi Emma,

On Fri, Apr 4, 2025, at 8:59 AM, Emma Dahlbo via ibm-acpi-devel wrote:
> Hello,
>
> I recently ran into an issue with the Lenovo ThinkPad L14 Gen 5 (AMD) 
> laptop when working with function keys. With Linux Kernel 6.6, pressing 
> FN+F11 will generate an ACPI event called "ibm/hotkey LEN0268:00 
> 00000080 00001320". However, with versions 6.11 and 6.12, this key 
> press does not generate any ACPI event at all.
>
> Additionally, there is an error in the journal:
>
> kernel: thinkpad_acpi: unhandled HKEY 0x1320
> kernel: thinkpad_acpi: please report the conditions when this event 
> happened to ibm-acpi-devel@lists.sourceforge.net
>
> However, this error shows up in all kernel versions that I tested (6.6, 
> 6.11, 6.12) and seems to not be connected (at least not directly) to 
> the ACPI issue.
>
> I reproduced this issue both with IGEL OS and Ubuntu 24.10 (kernel 6.11).
>
This was recently fixed upstream:
https://github.com/torvalds/linux/commit/7ba618e893a4580b04fb883aaed3f00539c3c361
I think the kernels you're testing must have picked up the fix, hence why 
you're not seeing the message anymore.

As a note, that particular hotkey feature doesn't do anything under Linux. I 
think you can register the KEY_LINK_PHONE action to do something in user space, 
but by default it gets ignored.

> Feel free to contact me if more details are needed!
>

Just as a note, for Thinkpad/ThinkCenter issues I have a weekly meeting with 
IGEL engineers. Ping me off mailing list if you need details :)

Mark


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