I have a similar problem. I run Ubuntu 6.06 on a dell optiplex gx260. Sound stopped working last week in the middle of a TV show and I've had no sound at all in Ubuntu since. I can't identify any errors at all in any logs in /var/log. I update my system manually every couple of days, so I don't believe that this happened in the middle of an update. Sound just stopped.
Rebooting to a live system with the Ubuntu 6.06 CD fixes the sound problem, so it doesn't seem to be hardware. lspci gives 0000:00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01) -- No sound suddenly https://launchpad.net/bugs/51556 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
