Jack, Since you see the problem only when running a non-Ubuntu kernel, it sounds like it is a problem with that kernel, rather than with xorg itself. You really need to report this issue to the people you got the broken kernel from.
** Changed in: xorg (Ubuntu) Status: Confirmed => Won't Fix -- GL applications leave artifact lines on screen, application unusable https://bugs.launchpad.net/bugs/255001 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs