On 2020-08-31 11:55 PM, Christian Bundy wrote:
After upgrading to Linux 5.8 I discovered an audio issue on my device that was introduced in 8ec7d6043263ecf250b9b7c0dd8ade899487538a [0]. I used 'git bisect' to identify the commit that introduced the bug and have confirmed that reverting the commit resolves the problem
Reproduction:
1. Play any audio via PulseAudio.
2. Observe that the audio output is fuzzy and choppy.
I can use programs like mpv to play audio without PulseAudio, and the audio is fine, but as soon as I open a process that uses PulseAudio it will ruin the audio output for all processes (including mpv) until I reboot.
I'm using a 2015 Chromebook Pixel ("Samus") and have confirmed this problem with a friend who has the same device.
Is there anything I can do to help debug this instead of sending a patch to revert the commit?
Hello Christian,
Thank you for report! Issue is a known one to us and has already been
addressed by:
[PATCH v4 00/13] ASoC: Intel: Catpt - Lynx and Wildcat point
https://www.spinics.net/lists/alsa-devel/msg113762.html
waiting for final dependency to be merged (Andy's resource-API changes,
as Mark already added the SPI ones) so v5 with review changes can be
provided. Shouldn't be long before this gets merged. As consequence,
/haswell/ ceases to exist.
Basically, once power-cycle (D0 -> D3 -> D0 transition flow) had been
fixed, more - previously hidden - problems arisen. Instead of sending
70+ patches to Mark refactoring existing code to recommended flow (+
readability and performance improvements), replacement is provided along
with old code being removed entirely.
For now, if there's a possibility for you to modify your kernel, said
patch can be safely removed from your local repo. Note: following is the
outcome:
- DMA init may occasionally fail on early boot (audio card won't be
present at all, requires reboot)
- D0/D3 flow doesn't follow recommended sequence and thus power-saving
may be limited or non-existent
Probably still better than permanently fuzzied audio..
I'm sorry for any inconvenience this has caused to you.
Regards,
Czarek
