Comment 41 for bug 1033533

It's a generic lockup bug, userspace will always fail in this way when nouveau locks up, but the real problem is in the kernel somewhere. Why nouveau locks up? Presumably something upset the card, causing it to hang. In case of make check, I would imagine one of the d3d9 tests could cause it. More specific information about the card and test would be helpful, and I would recommend filing a new bug for it against xserver-xorg-video-nouveau.