Public bug reported: When starting up Firefox after Thunderbird, or Thunderbird after Firefox, the system freezes. First the cursor usually freezes and no input is possible, but the desktop display remains, sometimes for about ten seconds. Then a pattern of horizontal bars appears on the screen. The bars are about two or three inches wide and about a quarter inch high, in various shades of color or black and white.
Pressing Alt+SysRq+1 followed by Alt+SysRq+t does nothing. It is a total system freeze and requires a cold boot. Problem began after installing upgrade to Ubuntu 13.04 (raring). My system is: Ubuntu 13.04 (raring) Gnome 3.6.3 Kernel 3.8.0-19 generic GCC Version 1.13.3 CPU Athentic AMD Model AMD Athlon 7850 Dual-Core Graphics Card: NVIDIA C61 (GeForce 7025 / nForce 630a) ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1176062 Title: 13.04 (raring) system crash with Firefox or Thunderbird To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1176062/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs