Re: [ibm-acpi-devel] thinkpad s495s: power button stops working after hibernation/resume: acpi_evalf(STRW, vd, ...) failed: AE_NOT_FOUND

[Michael T. <mj...@tl...>]

30.04.2024 10:34, Michael Tokarev wrote:
> Hi!
> 
> This is my first thinkpad, and since I use linux almost exclusively,
> it is running linux too (debian bookworm).  However, there are a few
> probs with it which I'd love to debug and find solution to.
> 
> One of the probs is the power button: it stops working after the first
> suspend-resume cycle.
> 
> Initially it is registered as event5 "Power Button".  After fresh boot,
> `input record` shows EV_KEY/KEY_POWER keypress events coming from it.
> So far, so good.
> 
> Now, I perform hibernation: `echo disk > /sys/power/state` or
> `systemctl hibernate` (I have to use `shutdown` method here instead of
> `platform`, since the latter does not work, which is another issue
> I'm trying to fix).  There's no GUI or anything fancy running, -
> just plain old command line on a linux tty.
> 
> And after resume, this button does not produce any events in linux
> anymore, after a note in dmesg:
> 
> [   24.788054] thinkpad_acpi: acpi_evalf(STRW, vd, ...) failed: AE_NOT_FOUND
> [   24.788058] thinkpad_acpi: Cannot set adaptive keyboard mode.
> 
> Here's the full `dmesg | grep thinkpad` output:
> 
> [    3.294025] thinkpad_acpi: ThinkPad ACPI Extras v0.26
> [    3.295427] thinkpad_acpi: http://ibm-acpi.sf.net/
> [    3.295431] thinkpad_acpi: ThinkPad BIOS R13ET55W(1.29 ), EC R13HT55W
> [    3.295433] thinkpad_acpi: Lenovo ThinkPad T495s, model 20QKS0EQ0N
> [    3.298362] thinkpad_acpi: radio switch found; radios are enabled
> [    3.300653] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
> [    3.303193] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
> [    3.318819] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
> [    3.364425] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one
> [    3.399354] thinkpad_acpi: secondary fan control detected & enabled
> [    3.425884] thinkpad_acpi: battery 1 registered (start 95, stop 100, behaviours: 0x7)
> [    3.433515] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input10
> [   24.202923] thinkpad_acpi: acpi_evalf(GTRW, dd, ...) failed: AE_NOT_FOUND
> [   24.202953] thinkpad_acpi: Cannot read adaptive keyboard mode.
> [   24.788054] thinkpad_acpi: acpi_evalf(STRW, vd, ...) failed: AE_NOT_FOUND
> [   24.788058] thinkpad_acpi: Cannot set adaptive keyboard mode.

I found another mention of - apparently - this issue, on the same hardware (though
the question was about something else):

   https://askubuntu.com/questions/1224358/thinkpad-t495s-suspend-issue

so it looks like the issue with the power button losing events with linux is old(ish).

Also, I verified how it works on windows (installing windows10 on this laptop) -
it works exactly as expected, after various suspend/hibernate/etc cycles, so the
problem isn't hardware (firmware).  But in case of windows, I guess it is using
equivalent of "platform" hibernation mode, while on linux I have to switch to
"shutdown" or else it doesn't resume.

Thanks,

/mjt