I have filed the bug at https://bugs.freedesktop.org/show_bug.cgi?id=70322, because I think it related to mesa. Still, also affects the ubuntu upgrade to 13.4. I downgraded back to 12.10 in order to keep openGl working.
** Bug watch added: freedesktop.org Bugzilla #70322 https://bugs.freedesktop.org/show_bug.cgi?id=70322 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1234565 Title: serious opengl bug in 13.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1234565/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
