Regular "cracks" in HDMI sound during playback since backport to 6.1.y for 92afcc310038 ("ALSA: hda: Conditionally use snooping for AMD HDMI")
Subsystems (3)
Hi
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?
Regards,
Salvatore
Quoted 12 lines · Salvatore Bonaccorso
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
92afcc310038ebe5d66c689bb0bf418f5451201cin the v6.1.y series which got applied in 6.1.104.Cf. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081833#47
Quoted 8 lines
#regzbot introduced:
92afcc310038ebe5d66c689bb0bf418f5451201c#regzbot link: https://bugs.debian.org/1081833It 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
Quoted 14 lines · Salvatore Bonaccorso
Hi
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
92afcc310038ebe5d66c689bb0bf418f5451201cin the v6.1.y series which got applied in 6.1.104.Cf. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081833#47
Quoted 8 lines
#regzbot introduced:
92afcc310038ebe5d66c689bb0bf418f5451201c#regzbot link: https://bugs.debian.org/1081833It 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?
Could you check 6.12-rc1 kernel whether the problem still appears? If yes, check with snd_hda_intel.snoop=0 boot option.
I guess we should revert the patch in anyway; for 6.12, it's no longer correct to check with get_dma_ops(), and if this causes a problem on the older releases, the assumption isn't correct, either.
thanks,
Takashi
Quoted 24 lines · Takashi Iwai
Quoted 21 lines · Salvatore Bonaccorso
Hi
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
92afcc310038ebe5d66c689bb0bf418f5451201cin 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/1081833It 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.
Quoted 8 lines
Quoted 1 line
Is there anything else we can try to provide?
Could you check 6.12-rc1 kernel whether the problem still appears? If yes, check with snd_hda_intel.snoop=0 boot option.
I guess we should revert the patch in anyway; for 6.12, it's no longer correct to check with
get_dma_ops(), and if this causes a problem on the older releases, the assumption isn't correct, either.
I decided to revert the commit. Will submit the patch now.
Takashi