The upstream alia-lib has not yet accepted the patch[1]. Shengyao, Hui, please clarify all "Cmedia Audio" chip does not support "Digital Output(S/PDIF)" as iec958 device.
[1] conf: USB - add "Cmedia Audio" to USB-Audio.pcm.iec958_device by jason77-wang · Pull Request #122 · alsa-project/alsa-lib - https://github.com/alsa-project/alsa-lib/pull/122/commits/879d57d979b59be8632ba788d5f567f2b6ec0c19 Regards -Rex -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to alsa-lib in Ubuntu. https://bugs.launchpad.net/bugs/1921452 Title: [SRU] alsa-lib: conf: USB - add "Cmedia Audio" to USB- Audio.pcm.iec958_device Status in OEM Priority Project: In Progress Status in alsa-lib package in Ubuntu: In Progress Status in alsa-lib source package in Focal: In Progress Status in alsa-lib source package in Groovy: In Progress Status in alsa-lib source package in Hirsute: In Progress Bug description: [Impact] On Cmedia Audio, unusable SPDIF can be selected as output from PulseAudio. [Fix] Disable IEC958 (SPDIF) through ALSA UCM. [Test] With the UCM applied, `pactl` and audio panel in gnome-control-center no longer have SPDIF option. [Where problems will occur] This fix limits to the Cmedia Audio only, other devices are unaffected. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1921452/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
