I found that disabling AMD C1E support in BIOS mitigates this issue (and also another problem I had with boot stalling without mouse/keyboard input) - this bug may be a duplicate of https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1012806.
The Phenom II X3 710 supports C1E power saving state, and BIOS F6 is the most recent release for the motherboard GA-MA790GP-DS4H. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1539967 Title: Audio skips (buffer underruns) intermittently but particularly when screen blanks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1539967/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs