Sound card is no longer detected in the latest upgrade, "dummy output" every
time when I reboot the OS now for me.
Saleh's fix in comment #16 did NOT fix my problem.
The kernel from #17 did NOT fix it for me neither.
~$ aplay -l
**** PLAYBACK 硬體裝置清單 ****
card 0: PCH [HDA Intel PCH], device 0: CX20588 Analog [CX20588 Analog]
子设备: 1/1
子设备 #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: CX20588 Digital [CX20588 Digital]
子设备: 1/1
子设备 #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
子设备: 1/1
子设备 #0: subdevice #0
～$ cat /proc/asound/card0/codec* | grep Codec
Codec: Conexant CX20588
Codec: Intel CougarPoint HDMI
~$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family
High Definition Audio Controller (rev 04)
~$ cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xd1c00000 irq 50
My Temporary Solution——
~$ sudo alsa force-reload
[sudo] password for longyuan:
Terminating processes: 1298 2021
2021.
Unloading ALSA sound driver modules: snd-hda-codec-hdmi snd-hda-codec-conexant
snd-hda-intel snd-hda-codec snd-hwdep snd-pcm snd-page-alloc snd-seq-midi
snd-seq-midi-event snd-rawmidi snd-seq snd-seq-device snd-timer (failed:
modules still loaded: snd-hda-codec-hdmi snd-hda-codec-conexant snd-hda-codec
snd-hwdep snd-pcm snd-page-alloc snd-timer).
Loading ALSA sound driver modules: snd-hda-codec-hdmi snd-hda-codec-conexant
snd-hda-intel snd-hda-codec snd-hwdep snd-pcm snd-page-alloc snd-seq-midi
snd-seq-midi-event snd-rawmidi snd-seq snd-seq-device snd-timer.
Though somethings failed, then the sound setting options come back, the
mic works, after I restart the X window, I can hear the voice, but lost
again when I reboot the computer.
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1169984
Title:
3.8.0-18 HDMI audio regression: Either oops or opening device fails
with -ENODEV
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