Have this issue on LMDE with legacy fglrx (8.97.100.3) on HD4950 and firefox 14.0.1. Occasional hangs, occasional X restarts.
Kern.log: Sep 24 11:02:46 kraken kernel: [10824.115071] [fglrx] IRQ 45 Disabled Sep 24 11:02:46 kraken mdm[3589]: WARNING: mdm_slave_xioerror_handler: Fatal X error - Restarting :0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/938981 Title: Xorg freeze when starting Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/938981/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs