Update: The original configuration had 2 x 4 GB DDR-3 modules. After upgrading to 4 x 4 GB DDR-3 modules, the problem has disappeared.
Suspect there is a memory issue involved in the interrupt handling process. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/843709 Title: IRQ handling issues on sandy bridge board To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/843709/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs