I ran into the same problem, updating from natty. Because of this bug, I downgraded the system to natty again, but the problem persists (running 2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011 x86_64).
Downgrading was performed by creating the following file, followed by running apt-get dist-upgrade:
I ran into the same problem, updating from natty. Because of this bug, I downgraded the system to natty again, but the problem persists (running 2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011 x86_64).
Downgrading was performed by creating the following file, followed by running apt-get dist-upgrade:
$ cat /etc/apt/ preferences. d/downgrade
Package: *
Pin: release a=natty
Pin-Priority: 1001
Package: *
Pin: release a=oneiric
Pin-Priority: 10