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
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: xioerror_ handler: Fatal X error - Restarting :0
Sep 24 11:02:46 kraken kernel: [10824.115071] [fglrx] IRQ 45 Disabled
Sep 24 11:02:46 kraken mdm[3589]: WARNING: mdm_slave_