On Tue, 03 Jan 2023 20:29:54 +0100, Michael Ralston wrote: > > On Wed, 4 Jan 2023 at 06:27, Michael Ralston <michael@xxxxxxxxxxxxx> wrote: > > > > On Wed, 4 Jan 2023 at 06:24, Michael Ralston <michael@xxxxxxxxxxxxx> wrote: > > > > > > I did a diff between the sound/usb directory for 6.0.16 and 6.1.2 and > > > reverted that entire directory. > > > > > > It is working with that change, so there must be something else. > > > > > > > Logs below... > > > > This line from the logs stands out to me as different. Could this mean anything? > > > Jan 04 06:20:27 leatherback kernel: usb 1-4: clock source 41 is not > > valid, cannot use This might be due to the commit ac5e2fb425e1121ceef2b9d1b3ffccc195d55707 ALSA: usb-audio: Drop superfluous interface setup at parsing I believe it's time to check which commit broke things. Assume that the bug is USB audio core changes, the following 8 commits are relevant: 1045f5f1ff0751423aeb65648e5e1abd7a7a8672 9355b60e401d825590d37f04ea873c58efe9b7bf a74f8d0aa902ca494676b79226e0b5a1747b81d4 9902b303b5ade208b58f0dd38a09831813582211 9a737e7f8b371e97eb649904276407cee2c9cf30 2be79d58645465351af5320eb14c70a94724c5ef ac5e2fb425e1121ceef2b9d1b3ffccc195d55707 Could you try to revert from top to bottom one-by-one, and check which one makes things working again? The most suspected one is 2be79d586454 (one before the last, a big change), but who knows... thanks, Takashi