Re: [REGRESSION] Toshiba Fn keys + lidswitch

"Rafael J. Wysocki" <[email protected]> Tue, 19 May 2026 16:08:36 +0200

Newsgroups	dev.linux.lists.regressions,org.kernel.vger.linux-acpi,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm,org.kernel.vger.platform-driver-x86,org.kernel.vger.stable
Message-ID	<CAJZ5v0jVQyWYqPo_MiUwNQb7FLNR_Q_++Xq=xA1owcHpcjN=OA@mail.gmail.com>

On Tue, May 12, 2026 at 7:16 PM Nick <[email protected]> wrote:
>
> My Toshiba Tecra X40 laptop's function keys no longer send events.
>
> Specifically the mute ("KEY_MUTE"), lock ("KEY_COFFEE"), "power plan"
> ("KEY_BATTERY"), sleep ("KEY_SLEEP"), mic mute (for some reason this
> reads as "KEY_SUSPEND"), screen switch ("KEY_SWITCHVIDEOMODE"),
> brightness ("KEY_BRIGHTNESSDOWN" and "KEY_BRIGHTNESSUP"), and rfkill
> ("KEY_WLAN") hotkeys -- these are the Fn-shifted versions of Esc, F1,
> F2, F3, F4, F5, F6, F7 and F8 -- keys no longer work. Neither does the
> lid-switch.
>
> Fn+F9, Fn+10, Fn+F11 and Fn+12 still work; those show up on
> /dev/input/event3 like the rest of my keyboard, but the hotkeys show up
> on /dev/input/event6.
>
> I'm on ArchLinux. My keys worked on v6.19.14, I first noticed them
> broken on v7.0.2.
>
> I bisected mainline and found the break is: "ACPI: scan: Use
> acpi_setup_gpe_for_wake() for buttons"
> <https://lore.kernel.org/all/[email protected]/>.
> That is, 57c31e6d620f132dcf610b2c52b4cdbd203c6f4a is bad and
> 88fad6ce090b395af4c654594a54589a386bf24b is good.
>
> #regzbot introduced: 57c31e6d620f132dcf610b2c52b4cdbd203c6f4a
>
> Maybe acpi_mark_gpe_for_wake was initializing something particular to
> Toshiba hardware?

Thanks for reporting!

I think that the problem is acpi_setup_gpe_for_wake() doing too much,
I'll send you a patch to test later today.