From the logs, it looks like the issue occurred while you were running kernel 3.3.0-030300-generic. Are you able to reproduce this issue with the latest 12.04 kernel (i.e., 3.2.0-20-generic)?
From the logs, it looks like the issue occurred while you were running kernel 3.3.0-030300- generic. Are you able to reproduce this issue with the latest 12.04 kernel (i.e., 3.2.0-20-generic)?