It's a Sandy Bridge machine, so commit http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-oneiric.git;a=commit;h=05bd42688dbc066d4e2689b6f73c0470601f788b (added in 3.0.0-7.8) might be causing the regression. Try re-enabling rc6 and see if that makes a difference?
It's a Sandy Bridge machine, so commit kernel. ubuntu. com/git? p=ubuntu/ ubuntu- oneiric. git;a=commit; h=05bd42688dbc0 66d4e2689b6f73c 0470601f788b
http://
(added in 3.0.0-7.8) might be causing the regression. Try re-enabling rc6 and see if that makes a difference?