downgrading the kernel (to the precise kernel) seems to eliminate the problem. Can try upgrading to the newest too if that is helpful.
root@toma:/usr/src# uname -a Linux toma 3.2.0-60-generic #91-Ubuntu SMP Wed Feb 19 03:54:44 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
downgrading the kernel (to the precise kernel) seems to eliminate the problem. Can try upgrading to the newest too if that is helpful.
root@toma:/usr/src# uname -a
Linux toma 3.2.0-60-generic #91-Ubuntu SMP Wed Feb 19 03:54:44 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux