Backtrace:
0: X(xf86SigHandler+0x7e) [0x80cdd8e]
1: [0xffffe420]
2: X(VidModeGetNumOfModes+0x40) [0x80ca450]
3: /usr/lib/X11/modules/extensions//libextmod.so [0xa7bf8b6a]
4: X [0x813d62e]
5: X(Dispatch+0x2ca) [0x80858ba]
6: X(main+0x495) [0x806ca55]
7: /lib/libc.so.6(__libc_start_main+0xdc) [0xa7da80ec]
8: X(FontFileCompleteXLFD+0x24d) [0x806bd41]

Fatal server error:
Caught signal 11.  Server aborting

disable montype: 1
(II) RADEON(0): RADEONRestoreMemMapRegisters() : 
(II) RADEON(0):   MC_FB_LOCATION   : 0x3fff3c00 0x3fff3c00
(II) RADEON(0):   MC_AGP_LOCATION  : 0x003f0000
finished PLL2
finished PLL1
Entering Restore TV
Restore TV PLL
Restore TVHV
Restore TV Restarts
Restore Timing Tables
Restore TV standard
Leaving Restore TV