Comment 2 for bug 436792

Note that I could reproduce the bug on two different frontend systems: after cold boot sound is well. After start of mythtv-frontend, sound is off, not even crackling (and I have no idea if it can be recovered and how, any advice what to try?).

The backend is an intrepid install and is running well.
The two frontends are of same karmic update status. the hardware is:
a) netbook Acer Aspire One A110L
b) motherboard Intel D945GCLF2 (atom330)

answers to your questions in your number order :

1) on the netbook
sudo apt-cache policy mythtv-frontend
mythtv-frontend:
  Installed: 0.22.0~trunk21954-0ubuntu2
  Candidate: 0.22.0~trunk21954-0ubuntu2
  Version table:
 *** 0.22.0~trunk21954-0ubuntu2 0
        500 http://archive.ubuntu.com karmic/multiverse Packages
        100 /var/lib/dpkg/status

2) sudo apt-cache policy mythtv-backend
mythtv-backend:
  Installiert: 0.21.0+fixes18722-0ubuntu1
  Kandidat: 0.21.0+fixes18722-0ubuntu1
  Versions-Tabelle:
 *** 0.21.0+fixes18722-0ubuntu1 0
        500 http://archive.ubuntu.com intrepid/multiverse Packages
        100 /var/lib/dpkg/status

3) it was a new install of karmic on both frontends

4) yes, just a daily update of karmic on both (but may be irrelevant, see 5)

5) after a reboot all is fine and sound is well. but starting mythtv-frontend, and sound is off

6) karmic will eventually be reinstalled, but I'd say it is not needed now, see 5)