No sound since recent kernel audate

[mpc_mythtv]

Hi,

Today, I installed the recent kernel security update (i.e. 2.6.32-24-generic #41-Ubuntu SMP). After a reboot, the sound is gone.

From my user account:
mpc@awd:~$ alsamixer
cannot open mixer: No such file or directory

Same problem with "aumix".

However, the commands "sudo alsamixer" and "sudo aumix" seem to work (but still no sound).

"lsmod | grep snd" will give
snd_hda_codec_atihdmi 2367 1
snd_hda_codec_realtek 203310 1
snd_hda_intel 21941 0
snd_seq_dummy 1338 0
snd_hda_codec 74201 3 snd_hda_codec_atihdmi,snd_hda_codec_realtek,snd_hd a_intel
snd_hwdep 5412 1 snd_hda_codec
snd_seq_oss 26726 0
snd_seq_midi 4557 0
snd_rawmidi 19056 1 snd_seq_midi
snd_pcm_oss 35308 0
snd_mixer_oss 13746 1 snd_pcm_oss
snd_seq_midi_event 6003 2 snd_seq_oss,snd_seq_midi
snd_pcm 70662 4 snd_hda_intel,snd_hda_codec,cx88_alsa,snd_pcm_oss
snd_seq 47263 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_mid i_event
snd_timer 19098 2 snd_pcm,snd_seq
snd_seq_device 5700 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi ,snd_seq
snd 54148 13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_seq_oss,cx88_alsa,snd_rawmidi,snd_pc m_oss,snd_mixer_oss,snd_pcm,snd_seq,snd_timer,snd_ seq_device
soundcore 6620 1 snd
snd_page_alloc 7076 2 snd_hda_intel,snd_pcm

Any idea?

Thanks in advance.

[mpc_mythtv]

Found a solution:

sudo users-admin

Then, "Manage groups". I select "audio", then click "Properties", and check the box associated to my login name (it was unchecked). Sound in userspace now working.

I also had to restart mythbackend; the mysql database was unaccessible for some reason (might be unrelated, I don't know).

After the kernel update, whether the sound was not working or the mysql database was unreachable (only one or the other of these two was broken, at random). Go figure...

[urbinbliss]

Thanks for the fix. I had the same problem. I also run MythTv, coincidence??

[bbb125]

I am also having sound problems (see my other post). When I check the "audio" properties using this method, I see that my username is also unchecked. When I check my name and press OK, I see:


(users-admin:1833): Gtk-CRITICAL **: gtk_list_store_set_valist: assertion `VALID_ITER (iter, list_store)' failed

Could this be part of my problem?

[urbinbliss]

Try not using sudo just
users-admin

[bbb125]

Still getting the same error. The box is checked now, but still no sound. Ahh, I am so frustrated with this sound problem that I will problem give up soon or have to try something else.

[bbb125]

But I am seeing a flurry of "no sound" posts lately, so it would be nice for a professional to address the problem since it is affecting many users. As a new user, this is very discouraging as I do not have the technical background to troubleshoot this problem on my own.