I am on a fresh install of 12.04, and my video card is a Quadro FX 570, which appears to be supported (see output of unity_support_test below). But my Xserver crashes randomly and causes my session to just shutdown and bring me back to the logging screen. This happens several times per hour.

After checking syslog it that a segfault in the nvidia driver is the cause of the problem:

Jun 13 11:14:17 lima kernel: [86569.828982] Xorg[17940]: segfault at ffebeb69 ip b4c8f7aa sp bf8076dc error 4 in nvidia_drv.so[b47a7000+706000]

Jun 13 11:14:36 lima gnome-session[18119]: Gdk-WARNING: gnome-session: Fatal IO error 11 (Ressource temporairement non disponible) on X server :3.#012

The funny thing is that as I was reporting this bug, my xserver crashed again (!) and this time I got another error message:

Jun 13 11:29:39 lima kernel: [87491.106441] NVRM: Xid (0000:02:00): 6, PE0001

Jun 13 11:29:39 lima gnome-session[26493]: Gdk-WARNING: gnome-session: Fatal IO error 11 (Ressource temporairement non disponible) on X server :4.#012

Any idea as to what can be the problem given that i am on a fresh install with a supported video card ?

Sébastien

== Output of unity_support_test $ /usr/lib/nux/unity_support_test -p OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: Quadro FX 570/PCIe/SSE2 OpenGL version string: 3.3.0 NVIDIA 295.40

Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes

Unity 3D supported: yes