Comment 33 for bug 194214

To summarize a bit the content of bug #124406 which contains very important information (I'll probably have missed some of them in this list):
- compiz or other 3D accelerators are not required for this bug to occur
- for most it started to occur after an upgrade to Gutsy (=2.6.22), but some even experienced it in Feisty
- for some, upgrading the kernel to Hardy Alpha2 fixed the problem, for others, it resurfaced with newer kernels
- at least one occurence in Gentoo
- the kernel bug in question is here: http://bugzilla.kernel.org/show_bug.cgi?id=9448