Re: No sound unless I toggle a GPIO pin

Dear Paul,


Am 28.04.21 um 13:15 schrieb Paul Koster:

> Hope you can help with me this. Got myself a brand new HP ENVY
> all-in-One with B&O speakers built-in. No sound at all whereas all
> controls and settings seem to work without hiccups. Turns out a GPIO pin
> needs to be set. Found this out using hda-analyzer python script. Now I
> execute this script on start-up to make it work:
> 
> /usr/bin/hda-verb /dev/snd/hwC0D0 0x01 SET_GPIO_MASK 0x04
> /usr/bin/hda-verb /dev/snd/hwC0D0 0x01 SET_GPIO_DIRECTION 0x04
> /usr/bin/hda-verb /dev/snd/hwC0D0 0x01 SET_GPIO_DATA 0x04
> 
> The strange thing is, when I close applications using sound, the system
> goes mute within a minute or so and I have to run hda-analyzer to toggle
> the 'enable' settings of this GPIO pin.
> 
> For now I run the gnome settings widget at startup, displaying the sound
> settings and running the hda-verb commands above. This seems enough to
> leave the sound on.

Nice analysis.

> Is there a better solution to work around this GPIO pin issue?

Yes, it should be fixed in the Linux kernel. Please create an issue in 
the Linux Bugzilla [1] as described in [1], and attach the 
`alsa-info.sh` output there.


Kind regards,

Paul


PS: I recommend to only buy systems with official GNU/Linux support like 
Google Chromebooks, Puri.sm, System76, Dell, Lenovo (and probably 
others). That way the right companies get your money.


[1]: https://www.alsa-project.org/wiki/Bug_Tracking