rt5650 on HP Chromebook G5 Setzer faults

[Mark Hills]

On Mon, 19 Dec 2022, Pierre-Louis Bossart wrote:

> On 12/18/22 7:02 AM, Mark Hills wrote:
> > HP Chromebook (11a, G5 "Setzer") uses snd_soc_sst_cht_bsw_rt5645 module
> > and presents a device "rt5650".
> 
> can you share the result of 'aplay -l', wondering which platform driver you
> are using.

I've pasted below; "rt5650 [sof-bytcht rt5650]" is in the output.

> > Audio works briefly, until after about 30 seconds it's interrupted by a
> > square wave or short buffer cycling.
> 
> If this is with the SOF driver, there's a known issue and a known workaround,
> please add this to /etc/modprobe.d/alsa-base.conf
> 
> options snd_sof sof_debug=1

Thanks. It does indeed appear to be a workaround. I didn't notice any 
additional debug in dmesg.

For my own interest, do you have a URL or link to the origin of this 
workaround?

I did however manage to trigger the same sound when Firefox opened the 
audio input device in another tab while playing a YouTube video. I didn't 
see a bug report in dmesg. This isn't a use case I'm too worried about 
yet.

But this has certainly improved stability to the point that it's usable! 
Thank you.

-- 
Mark



$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: rt5650 [sof-bytcht rt5650], device 0: PCM (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: rt5650 [sof-bytcht rt5650], device 1: PCM Deep Buffer (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0