https://bugs.freedesktop.org/show_bug.cgi?id=34457
reimth@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED
--- Comment #6 from reimth@gmail.com 2012-02-29 14:57:52 PST --- The problem is known in Ubuntu: see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/810926.
Either upgrade your system to Ubuntu Oneiric or install the fixed kernel (with backported kernel patches) from Launchpad PPA for Ubuntu Maverick.
Both solutions will fix the problem, as it did for the others having this special buggy chipset.
btw the Ubuntu bug has been closed with status Fix released.