(gdb) Signal        Stop	Print	Pass to program	Description
SIGUSR1       No	Yes	Yes		User defined signal 1
(gdb) Signal        Stop	Print	Pass to program	Description
SIGUSR2       No	Yes	Yes		User defined signal 2
(gdb) Signal        Stop	Print	Pass to program	Description
SIGPIPE       No	Yes	Yes		Broken pipe
(gdb) Starting program: /usr/bin/Xorg -dpi 100 -nolisten tcp
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[Thread debugging using libthread_db enabled]
[New Thread 805442128 (LWP 19894)]
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Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 805442128 (LWP 19894)]
0x0f7f88b8 in RADEONSetupConnectors (pScrn=0x101ffd90) at ../../src/radeon_display.c:935
935		pRADEONEnt->pOutput[i]->MonInfo = NULL;
(gdb) #0  0x0f7f88b8 in RADEONSetupConnectors (pScrn=0x101ffd90) at ../../src/radeon_display.c:935
#1  0x0f7d82c0 in RADEONPreInitControllers (pScrn=0x101ffd90, pInt10=0x0) at ../../src/radeon_driver.c:2414
#2  0x0f7d9480 in RADEONPreInit (pScrn=0x101ffd90, flags=0) at ../../src/radeon_driver.c:2808
#3  0x100653b8 in InitOutput ()
#4  0x10025d98 in main ()
(gdb) Continuing.

Program received signal SIGABRT, Aborted.
0x0fc6ad6c in raise () from /lib/libc.so.6
(gdb)