[This question has been formulated using chatGPT4, which hasn't been able to solve my problem, so I requested him to make a report so someone could help me with it]
I am experiencing an issue where my audio hardware (Intel Corporation Comet Lake PCH-LP cAVS [8086:02c8]) is not being recognized by Ubuntu 22.04 LTS. The system only shows "Dummy Output" despite the kernel logs indicating that the SOF (Sound Open Firmware) driver is loaded and the hardware is detected.
Steps to Reproduce:
Install Ubuntu 22.04 LTS on hardware with Intel Comet Lake PCH-LP cAVS audio.Update all system packages to the latest versions.Reboot the system.Check audio output with aplay -l and pactl list short sinks.
Expected Results:
The audio devices should be recognized, and sound should be output through the hardware audio devices.
Actual Results:
No audio devices are found (aplay: device_list:274: no soundcards found...), and PulseAudio only shows 0 auto_null module-null-sink.c s16le 2ch 44100Hz SUSPENDED.
System Information:
Kernel version: 6.5.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr 4 14:39:20 UTC 2024 x86_64 x86_64 x86_64 GNU/Linuxlspci output for audio device: 00:1f.3 Audio device [0403]: Intel Corporation Comet Lake PCH-LP cAVS [8086:02c8] Subsystem: QUANTA Computer Inc Comet Lake PCH-LP cAVS [152d:125d] Kernel driver in use: sof-audio-pci-intel-cnlPulseAudio sinks: 0 auto_null module-null-sink.c s16le 2ch 44100Hz SUSPENDED
Kernel Logs:
Relevant dmesg output:[4.625141] sof-audio-pci-intel-cnl 0000:00:1f.3: enabling device (0000 -> 0002)[5.104555] sof-audio-pci-intel-cnl 0000:00:1f.3: Firmware: ABI 3:20:0 Kernel ABI 3:23:0[5.104559] sof-audio-pci-intel-cnl 0000:00:1f.3: unknown sof_ext_man header type 3 size 0x30
Configuration Files:
/etc/modprobe.d/alsa-base.conf has been adjusted to force the use of the SOF driver and disable digital mic detection, without resolving the issue.
Troubleshooting Steps Taken:
Reinstalled the Linux kernel and SOF firmware.Adjusted ALSA and PulseAudio configurations.Checked for muted channels and correct output settings in alsamixer and pavucontrol.All changes have been made based on advice from various forums and previous similar issues.
Additional Information:
The audio hardware functions correctly under Windows 10, suggesting a potential compatibility or configuration issue with Linux.
