Re: [regression] Regular "cracks" in HDMI sound during playback since backport to 6.1.y for 92afcc310038 ("ALSA: hda: Conditionally use snooping for AMD HDMI")

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Hi! On 28.09.24 15:19, Salvatore Bonaccorso wrote:
> 
> In downstream Debian we got a report from  Eric Degenetais, in
> https://bugs.debian.org/1081833 that after the update to the 6.1.106
> based version, there were regular cracks in HDMI sound during
> playback.
> 
> Eric was able to bisec the issue down to
> 92afcc310038ebe5d66c689bb0bf418f5451201c in the v6.1.y series which
> got applied in 6.1.104.
> 
> Cf. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081833#47
> 
> #regzbot introduced: 92afcc310038ebe5d66c689bb0bf418f5451201c
> #regzbot link: https://bugs.debian.org/1081833
> 
> It should be noted that Eric as well tried more recent stable series
> as well, in particular did test as well 6.10.6 based version back on
> 20th september, and the issue was reproducible there as well.
> 
> Is there anything else we can try to provide?

Just "the usual", which is not widely known, so allow me to explain.

Please in situations like this *always* try to test a recent mainline
kernel. Given the timing, it's best to test 6.12-rc1 once it out later
today.

That's because it's unclear if this is something the regular maintainers
or the stable team/the one that asked for the backport has to handle.
Some developers do not care, but often it's required, as otherwise
nobody will take a close look -- especially when it comes to longterm
kernels. That's because participation in stable/longterm maintenance is
entirely optional for mainline developers (e.g. the author of the
culprit). This page
https://linux-regtracking.leemhuis.info/post/frequent-reasons-why-linux-kernel-bug-reports-are-ignored/
has a few points that explain the problem in more detail.

HTH, Ciao, Thorsten




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