Karmic: occasional no sound at boot up

[Mark Fraser]

On Tuesday 16 Mar 2010 20:09:59 Mark Greenwood wrote:
> On Saturday 13 Mar 2010 18:20:34 Mark Fraser wrote:
> > On Saturday 13 Mar 2010 17:28:08 Mark Greenwood wrote:
> > > On Saturday 13 Mar 2010 17:11:41 Mark Greenwood wrote:
> > > > On Friday 26 Feb 2010 23:26:18 lanzen wrote:
> > > > > On Wednesday 24 February 2010 19:49:34 Jonas Norlander wrote:
> > > > > > On 23 February 2010 17:03, Mark Fraser
> > > > > > <ubuntu at mfraz.orangehome.co.uk>
> > > > >
> > > > > wrote:
> > > > > > > Occasionally when I turn my computer on, I will get a pop up
> > > > > > > appearthere saying that it couldn't find any sound drivers.
> > > > > > > Shutting down and then rebooting gets the sound back, but it is
> > > > > > > getting annoying!
> > > > > >
> > > > > > I used to have this problem to. The cause was that some package
> > > > > > had a wrong dependency and pulled in pulsaudio, purging pulsaudio
> > > > > > and some other packages solved it. This was on Jaunty, in Karmic
> > > > > > I haven't had this problem.
> > > > >
> > > > > Karmic here and I see this happening from time to time on both my
> > > > > eeepc and the desktop PC. I did all I knew I could to get rid of
> > > > > pulsaudio that still shows up in the audio setting window. I cannot
> > > > > remove it. It doesn't show as default and I don't know what it does
> > > > > there. libpulse0 is in and, as Mark said, it looks like it doesn't
> > > > > like being touched. Startup sound plays.
> > > > >
> > > > > On reboot I always get the audio back.
> > > >
> > > > I'll add a 'me too' to this one. However for me even a reboot has
> > > > stopped curing it. I now have no sound in KDE, but skype and mplayer
> > > > etc all still work.
> > > >
> > > > I also have a USB sound card. If that is connected to the computer on
> > > > boot up, KDE doesn't find it. If I connect it after booting up, KDE
> > > > finds it and I can use it. So I suspect this problem is some kind of
> > > > initialisation thing where KDE is searching for the sound card before
> > > > it is 'ready'.
> > > >
> > > > Mark
> > >
> > > Hmm, just out of interest, the people having this issue haven't
> > > recently installed anything from the nVIDIA VDPAU PPA have they? I
> > > notice that includes a load of xine packages, and I started having
> > > these problems around the time I upgraded from that PPA.
> >
> > No, I haven't added the nVidia PPA repository, but I did have the Kubuntu
> > backports PPA enabled for a while until they put KDE4.4 in there.
> 
> You might be interested to try this, it *seems* to have worked for me (so
>  far, I'm not counting my chickens yet though).
> 
> This only applies if you have Intel HD audio or compatible, but:
> 
> in /etc/modprobe.d/alsa-base.conf
> find
> options snd-hda-intel power_save=10 power_save_controller=N
> and change it to
> options snd-hda-intel power_save=10

Will try that, but I have reported a bug on Launchpad 
https://bugs.launchpad.net/bugs/540796

Looking at the differences between the two runs of alsa-info, I see that with 
no sound under the section APLAY both analogue and digital outputs are under 
Subdevices: 1/1. With it working analogue is 0/1 and digital is 1/1.

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