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This GDB was configured as "i486-linux-gnu".
(gdb) Reading symbols from /usr/bin/Xorg...Reading symbols from /usr/lib/debug/usr/bin/Xorg...done.
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
done.
(gdb) (gdb) Signal        Stop	Print	Pass to program	Description
SIGUSR1       No	Yes	Yes		User defined signal 1
(gdb) Starting program: /usr/bin/Xorg 

X Window System Version 1.3.0
Release Date: 19 April 2007
X Protocol Version 11, Revision 0, Release 1.3
Build Operating System: Linux Ubuntu (xorg-server 2:1.3.0.0.dfsg-12ubuntu8)
Current Operating System: Linux dcerouter 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686
Build Date: 29 September 2007
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Nov 28 09:55:20 2007
(==) Using config file: "/etc/X11/xorg.conf"
(II) Module already built-in
(II) Module already built-in
(II) Module already built-in

Program received signal SIGSEGV, Segmentation fault.
0x0816e4b9 in RRCrtcSetRotations (crtc=0x0, rotations=1)
    at ../../randr/rrcrtc.c:108
108	../../randr/rrcrtc.c: No such file or directory.
	in ../../randr/rrcrtc.c
(gdb) warning: Memory read failed for corefile section, 1048576 bytes at 0xa7b14000.
warning: Memory read failed for corefile section, 65536 bytes at 0xb7b9b000.
Saved corefile core.Xorg.fSkaT10683
(gdb) #0  0x0816e4b9 in RRCrtcSetRotations (crtc=0x0, rotations=1)
    at ../../randr/rrcrtc.c:108
No locals.
#1  0x080fe2cb in xf86RandR12SetRotations (pScreen=0x82286a0, rotations=1)
    at ../../../../hw/xfree86/modes/xf86RandR12.c:534
	c = 1
	config = (xf86CrtcConfigPtr) 0x8227588
#2  0x080fa475 in xf86CrtcScreenInit (screen=0x82286a0)
    at ../../../../hw/xfree86/modes/xf86Crtc.c:672
	scrn = <value optimized out>
	config = (xf86CrtcConfigPtr) 0x8227588
	c = 1
#3  0xb7bdc26d in RHDRandrScreenInit (pScreen=0x82286a0) at rhd_randr.c:1027
	pScrn = (ScrnInfoPtr) 0x8216038
	rhdPtr = (RHDPtr) 0x8216ae8
	__func__ = "RHDRandrScreenInit"
#4  0xb7bca325 in RHDScreenInit (scrnIndex=0, pScreen=0x82286a0, argc=1, 
    argv=0xbfd05044) at rhd_driver.c:861
	pScrn = (ScrnInfoPtr) 0x8216038
	rhdPtr = (RHDPtr) 0x8216ae8
	ret = 1
	visual = (VisualPtr) 0x8229514
	racflag = 0
	__func__ = "RHDScreenInit"
#5  0x0807653e in AddScreen (pfnInit=0xb7bc9f73 <RHDScreenInit>, argc=1, 
    argv=0xbfd05044) at ../../dix/main.c:805
	i = 0
	scanlinepad = <value optimized out>
	format = 7
	depth = <value optimized out>
	bitsPerPixel = <value optimized out>
	k = 2
	pScreen = <value optimized out>
#6  0x080a86ce in InitOutput (pScreenInfo=0x8202a80, argc=1, argv=0xbfd05044)
    at ../../../../hw/xfree86/common/xf86Init.c:924
	i = <value optimized out>
	j = 74
	k = <value optimized out>
	scr_index = 136325760
	modulelist = <value optimized out>
	optionlist = (pointer *) 0x82129b0
	layout = <value optimized out>
	screenpix24 = <value optimized out>
	pix24 = Pix24Use32
	pix24From = X_PROBED
	autoconfig = <value optimized out>
	generation = 1
#7  0x08076ceb in main (argc=1, argv=0xbfd05044, envp=0xbfd0504c)
    at ../../dix/main.c:370
	i = <value optimized out>
	error = 136217184
	xauthfile = <value optimized out>
	alwaysCheckForInput = {0, 1}
(gdb) The program is running.  Exit anyway? (y or n) [answered Y; input not from terminal]