try latest driver https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS
you have to report to alsa devel mailing list if pin ctls of speaker node still change to 0x00 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1208218 Title: intermittent left-channel audio distortion To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1208218/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
