[alsa-devel] [pulseaudio-discuss] ThinkPad T-510 audio output mute LED non-workingness
Glenn Golden
gdg at zplane.com
Tue Apr 28 12:16:45 CEST 2015
Takashi Iwai <tiwai at suse.de> [2015-04-28 08:06:50 +0200]:
>
> It's the call:
> led_set_func(TPACPI_LED_MUTE, false)
> and this returns an error. led_set_func is a function pointer to
> tpacpi_led_set:
> led_set_func = symbol_request(tpacpi_led_set);
>
> So the above indicates that the call in thinkpad_acpi.c failed.
>
> Could you check what value is returned from
> led_set_func(TPACPI_LED_MUTE, false)?
>
> My wild guess is that it's -ENODEV.
>
Yep:
[ 13.379016] sound hdaudioC0D0: XXX hda_fixup_thinkpad_acpi init...
[ 13.392760] sound hdaudioC0D0: XXX ok, this is thinkpad
[ 13.404553] sound hdaudioC0D0: XXX mute LED NOT WORKING!
[ 13.416106] XXX led_set_func(TPACPI_LED_MUTE, false) returned -19
[ 13.427719] sound hdaudioC0D0: XXX ok, mic LED is hooked
Question: To simplify/speed debugging going forward: Is there some
straightforward way to unload/reload all the relevant sound modules as
an alternative to rebooting? I came across some 'recipes', but none
looked straightforward; lots of conditionality on the particular subset
of modules being patched/debugged, but alas I've not enough knowledge
to guess at exactly what that subset should be for what we're doing here.)
Thx.
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