Score:0

No audio after upgrading kernel to 5.15.0-60

co flag

After upgrading to new kernel all audio in/out was lost. Reverting back to previous kernel restores audio. While booted into the new kernel, I found that if I run "alsamixer" on the command line, I get:

alpha@Gaia2:~$ alsamixer ALSA lib confmisc.c:855:(parse_card) cannot find card '0' ALSA lib conf.c:5178:(_snd_config_evaluate) function snd_func_card_inum returned error: No such file or directory ALSA lib confmisc.c:422:(snd_func_concat) error evaluating strings ALSA lib conf.c:5178:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1334:(snd_func_refer) error evaluating name ALSA lib conf.c:5178:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5701:(snd_config_expand) Evaluate error: No such file or directory ALSA lib control.c:1528:(snd_ctl_open_noupdate) Invalid CTL default cannot open mixer: No such file or directory

So the new kernel is not seeing the audio sound hardware (Realtek ALC1220).

I tried uninstalling dkms and rebooting, then reinstalling dkms. No change. How can I find and install the ALC1220 driver?

Score:0
co flag

I discovered that when Ubuntu queued up the 5.15.0-60 kernel for download, my system didn't also download the linux-modules-extra-5.15.0-60 package. I downloaded and installed this package and audio functionality was restored.

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