Comment 2 for bug 302548

me too.

It seems the cause has been found:
https://bugs.freedesktop.org/show_bug.cgi?id=18160#c8
"It's a combination of bugs. So far, we've identified bugs in: - Xorg - libc possibly - kernel PCI"
so attaching more proof is just noise.

There is a patch: https://bugs.freedesktop.org/show_bug.cgi?id=18160#c11
"This patch is enough to turn the hang into the error it should have been."

" solves at least one Xorg problem, and works around the libc problem. "