Control: tags -1 + moreinfo Hi,
On Wed, Nov 04, 2026 at 08:44:37PM +0000, Wolle Hartz wrote: > Package: linux-image-6.12.115+deb13.1-amd64 > > Severity: normal > > Package: linux-image-6.12.115+deb13.1-amd64 > > Source: linux > > I am reporting a possible regression affecting USB audio playback > with the Steinberg UR22C audio interface. > > Summary > > With Debian kernel 6.12.115+deb13.1-amd64, the Steinberg UR22C is > detected correctly by the USB subsystem and ALSA. PipeWire also > recognizes the device and creates an audio sink. > > However, audio playback fails. Direct ALSA playback returns an I/O > error (-EIO). > > The problem was initially observed in a VirtualBox environment and > was subsequently reproduced on separate physical hardware. The same > interface works under Windows 11 and also worked with a CachyOS live > system. > > After installing and booting the Debian Trixie Backports kernel > 7.2.11, the problem was resolved. The UR22C playback works with that > kernel. > > This suggests a possible regression or compatibility issue in the > 6.12 kernel series. I have not performed a kernel bisect, so I > cannot identify the exact commit responsible. You are talking above above a possible regression. Can you confirm I understood correctly, it worked before in a trixie provided kernel, e.g. 6.12.113-1 but not anymore in 6.12.115-2? If yes that smells like the known tracked regression (covered in #1152888). But I would first want to understand if it worked in earlier 6.12.y versions. Regards, Salvatore
