the crash without interaction seems to be fixed, didn't test if qvdpautest still triggers a crash, too.
(updated to this kernel) Linux version 3.16.0-5-generic (buildd@toyol) (gcc version 4.8.3 (Ubuntu 4.8.3-5ubuntu2) ) #10-Ubuntu SMP Mon Jul 21 16:16:35 UTC 2014 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1302574 Title: computer randomly freezes with screen coruption (Radeon HD 5750, IOMMU enabled) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1302574/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs