I have this problem too, and a separate problem with my graphics under Sandybridge: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/761065
There is a kernel available that fixes my graphics problem at comment #38 in the above bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/761065/comments/38
It also seems to have fixed my suspend problem, so might be worth a try.
I have this problem too, and a separate problem with my graphics under Sandybridge: /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/761065
https:/
There is a kernel available that fixes my graphics problem at comment #38 in the above bug: /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/761065/ comments/ 38
https:/
It also seems to have fixed my suspend problem, so might be worth a try.