Hi, Kevin Becker (kevinbecker) Thanks for your suggestion. I followed the instructions provided at Ubuntu's kernel lifecycle page and successfully upgraded to the latest HWE kernel โ 6.14.0-27 โ on Ubuntu 24.04.3 LTS.
Unfortunately, the issue persists. The snd_hda_intel module loads correctly, and ALSA detects the codec (Realtek ALC1220), but there is still no UCM profile available for this device. As a result, the system remains without functional audio output. Diagnostic Report: CS8409 on iMac18,3 running Ubuntu 24.04.3 (kernel 6.14.0-27) ๐ฅ๏ธ Hardware Model: iMac18,3 (Apple) Audio chip: Cirrus Logic CS8409 GPU: AMD Radeon (with HDMI audio) ๐งช Test Environment Ubuntu Live 24.04.3 Kernel: 6.14.0-27-generic Wayland session PipeWire active ๐ฆ Driver Status The snd_hda_codec_cs8409 module loads correctly: bash lsmod | grep cs8409 dmesg confirms detection and autoconfiguration: text snd_hda_codec_cs8409 hdaudioC0D0: autoconfig for CS8409: line_outs=2 (0x24/0x25) type:speaker ... Internal Mic=0x45, Mic=0x3c ๐ Issue ALSA registers card0 (CS8409), but: No output devices No mixer controls GUI shows only HDMI outputs (card1) PipeWire does not recognize card0 as a usable device alsa-info.sh output: http://alsa- project.org/db/?f=45ed57a6e0a42cb82202b8429318197a073fc0bf ๐ Likely Cause Missing UCM profile for CS8409, so ALSA doesn't know how to interact with the hardware. The module works, but without defined outputs/mixers, it's non-functional. โ Verified Module loads ALSA registers it dmesg shows correct detection PipeWire is running but ignores card0 HDMI outputs are functional ๐ก Suggested Solution Create and add a UCM profile for CS8409 (e.g., ucm2/CS8409/HiFi.conf) Define basic mixer controls and outputs Verify compatibility with PipeWire -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2119402 Title: )Persistent driver issues on iMac 18,3 (27", 2017) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2119402/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
