https://bugs.freedesktop.org/show_bug.cgi?id=45968
--- Comment #6 from Alex Deucher agd5f@yahoo.com 2012-02-13 08:22:51 PST --- Does it work ok with a pre3.3 kernel (e.g., 3.2, 3.1, etc.)? If so, does reverting this commit fix the issue?
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=...