(In reply to Jean-Philippe Gariépy from comment #11) > The only hint that I have so far is the "r300: CS space validation failed." > message. If it's a problem with the desktop compositor violating the > contract, which Gnome component is reponsible? Just trying to log the bug at > the right level. It's probably assigned correctly now. The message indicates that the r300 driver isn't coping with the amount of VRAM available to it.