[alsa-devel] [pulseaudio-discuss] ThinkPad T-510 audio output mute LED non-workingness

[Takashi Iwai]

At Mon, 27 Apr 2015 18:02:06 -0600,
Glenn Golden wrote:
> 
> Takashi Iwai <tiwai at suse.de> [2015-04-27 19:12:21 +0200]:
> > 
> > Below is a debug patch, and now you should see messages like "XXX ..."
> > in kernel log at loading the driver.  If there is no such a message,
> > it means that the thinkpad hook isn't built in at all.  Please check
> > the kernel log again with the patch.
> > 
> 
> Here are the XXX messages:
> 
>     [   13.722755] sound hdaudioC0D0: XXX hda_fixup_thinkpad_acpi init...
>     [   13.724366] sound hdaudioC0D0: XXX ok, this is thinkpad
>     [   13.724373] sound hdaudioC0D0: XXX mute LED NOT WORKING!
>     [   13.724374] sound hdaudioC0D0: XXX ok, mic LED is hooked
> 
> Smoking gun?

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.


Takashi