Created attachment 303608 [details] Kernel bisection log. Running kernels v6.1+, all audio playback through Steinberg UR22C interface becomes accelerated with lots of crackling and micro-skipping. Kernel bisection marks ac5e2fb425e1121ceef2b9d1b3ffccc195d55707 as the first bad commit (log attached). Test result shows the bug can be solved by reverting this commit. $ git bisect good ac5e2fb425e1121ceef2b9d1b3ffccc195d55707 is the first bad commit commit ac5e2fb425e1121ceef2b9d1b3ffccc195d55707 Author: Takashi Iwai <tiwai@suse.de> Date: Wed Aug 31 15:00:21 2022 +0200 ALSA: usb-audio: Drop superfluous interface setup at parsing We reset each interface that is being parsed for each stream, but this is superfluous and even can lead to spurious errors. Since the interface is set up properly at opening the endpoint for each actual stream operation, let's drop the superfluous one. Link:20220831130021.4762-1-tiwai@suse.de"> https://lore.kernel.org/r/20220831130021.4762-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> sound/usb/stream.c | 6 ------ 1 file changed, 6 deletions(-)
This commit is already known to be bad and a revert will be part of the next stable release. https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.1/revert-alsa-usb-audio-drop-superfluous-interface-setup-at-parsing.patch