I have R51e Thinkpad too and I have the same problem. It happens randomly, sometimes after hour, sometimes after pause in mplayer...
I have Jaunty and I tried new PulseAudio 0.9.15 (http://ppa.launchpad.net/themuso/ppa/ubuntu/), new alsa (1.0.20), I tried uninstall Pulse, nothing helps... -- ATI IXP AC97: sound regression between 2.6.24-16 and 2.6.27-11 kernels https://bugs.launchpad.net/bugs/327993 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs