Control: forcemerge 1152888 1153143 Hi,
On Thu, Nov 05, 2026 at 11:23:08PM -0600, Justin Fasnacht wrote: > Package: src:linux > Version: 6.12.115-2 > Severity: important > > After upgrading from 6.12.113-1 to 6.12.115-2 on Debian 13 (trixie, amd64), > playback on my Behringer UMC404HD 192k USB audio interface (USB ID > 1397:0509) > is silent. Capture from the same interface keeps working. > > Booting 6.12.113-1 again restores playback with no other changes. > > What I checked on 6.12.115-2: > - PipeWire 1.4.2 sends audio to the interface and the level meters move. > - /proc/asound/U192k/stream0 shows Playback "Status: Running" at 48000 Hz. > - No errors for the device in dmesg. > - The device's ALSA mixer controls are at 100% (0 dB) and unmuted. > - Silent with the UCM "Direct" profile, PipeWire's "Pro Audio" profile, > and GNOME's speaker test. > - The interface's hardware monitoring (input to headphones) works, > so the headphone output itself is fine. > > System: ASUS PRIME B550-PLUS, AMD Ryzen 9 5900X. NVIDIA's proprietary > driver (DKMS) is installed. > > The same symptom on the same kernel has been reported with Focusrite > Scarlett interfaces (4i4 Gen3, Solo Gen3), so this may affect USB audio > interfaces in general rather than one device: > https://github.com/geoffreybennett/linux-fcp/issues/62 > > I can test patches or provide more logs. Please see #1152888. So yes please if you can, test as well: https://salsa.debian.org/kernel-team/linux/-/blob/7a5ee3dcc1c3e1e703506151b835a639d555c1c0/debian/patches/bugfix/all/ALSA-usb-audio-Use-the-right-limit-for-PCM-OOB-check.patch Regards, Salvatore
