I think I found the culprit: rhythmbox This is why it does not happen everytime. It happens only if rhythmbox is running (not playing but iconified in tray).
-- [HARDY] loud noise on resume [XPSM1330] https://bugs.launchpad.net/bugs/205925 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
