Comment 33 for bug 550218

I've got an xserver package with the patch on the linked fdo bug [1] here which fixes the segfaults for me. It will take a few hours to build on the PPA though.

https://edge.launchpad.net/~sarvatt/+archive/bugfixes

Also the patched xserver is available in xorg-edgers, but if you are going to test one please try the above linked one instead.

https://edge.launchpad.net/~xorg-edgers/+archive/ppa

[1] https://bugs.freedesktop.org/show_bug.cgi?id=26394#c21