Comment 6 for bug 515937

It seems this bug is related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/346691, which seems to randomly affect different 64bit kernel releases and not others. This would explain why the error report on the Ubuntu forums about this dated back to 2008 and such. If the developers looked for a patch pattern within the affected kernels, that would likely be a good start.

I think the reason this recently started affecting me a lot might be due to the latest kernel (2.6.32-22). I did not have the issues as all with kernel 2.6.32-21 as GUmeR reports, so reverting to that is the best bet for avoiding this issue for now. Cheers.