Backtrace:
0: /var/X11R6/bin/X(xf86SigHandler+0x6d) [0x488a3d]
1: /lib64/libc.so.6 [0x2b237431d5b0]
2: /usr/lib64/xorg/modules//drivers/fglrx_drv.so(swlDalHelperValidateModeFromDAL
+0x53f) [0x2b23765d6f1f]
3: /usr/lib64/xorg/modules//drivers/fglrx_drv.so [0x2b23765b93cf]
4: /usr/lib64/xorg/modules//drivers/fglrx_drv.so(atiddxPreInit+0x851) [0x2b23765
b4c91]
5: /var/X11R6/bin/X(InitOutput+0x9ec) [0x45fa6c]
6: /var/X11R6/bin/X(main+0x275) [0x431055]
7: /lib64/libc.so.6(__libc_start_main+0xf4) [0x2b237430aae4]
8: /var/X11R6/bin/X(FontFileCompleteXLFD+0x241) [0x430539]

Fatal server error:
Caught signal 11.  Server aborting