nok@greg:~$ ssh 192.168.1.116 -l bugabundo
Password: 
Linux blubug 2.6.28-6-generic #17-Ubuntu SMP Fri Jan 30 15:35:08 UTC 2009 x86_64


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Last login: Sat Feb  7 11:49:38 2009
bugabundo@blubug:~$ pgrep Xorg
5404
bugabundo@blubug:~$ sudo gdb /usr/bin/Xorg
[sudo] password for bugabundo: 
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(gdb) r
Starting program: /usr/bin/Xorg 
[Thread debugging using libthread_db enabled]

Fatal server error:
Server is already active for display 0
	If this server is no longer running, remove /tmp/.X0-lock
	and start again.


Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 

 ddxSigGiveUp: Closing log

Program exited with code 01.
(gdb) attach <the process ID you found above>
Illegal process-id: <the process ID you found above>.
(gdb) attach 5404
Attaching to program: /usr/bin/Xorg, process 5404
`system-supplied DSO at 0x7fff191ff000' has disappeared; keeping its symbols.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/libpciaccess.so.0
Loaded symbols for /lib/libdl.so.2
Loaded symbols for /lib/libpthread.so.0
Loaded symbols for /usr/lib/libXfont.so.1
Loaded symbols for /usr/lib/libXau.so.6
Loaded symbols for /usr/lib/libfontenc.so.1
Loaded symbols for /usr/lib/libpixman-1.so.0
Loaded symbols for /usr/lib/libhal.so.1
Loaded symbols for /lib/libdbus-1.so.3
Loaded symbols for /usr/lib/libXdmcp.so.6
Loaded symbols for /usr/lib/libssl.so.0.9.8
Loaded symbols for /usr/lib/libcrypto.so.0.9.8
Loaded symbols for /lib/libm.so.6
Loaded symbols for /lib/librt.so.1
Loaded symbols for /lib/libc.so.6
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug/lib/ld-2.9.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Loaded symbols for /usr/lib/libfreetype.so.6
Reading symbols from /usr/lib/xorg/modules/extensions/libextmod.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libextmod.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//libextmod.so
Reading symbols from /usr/lib/xorg/modules/extensions/libdbe.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libdbe.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//libdbe.so
Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//libglx.so
Reading symbols from /usr/lib/libGLcore.so.1...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/libGLcore.so.1
Reading symbols from /usr/lib/tls/libnvidia-tls.so.1...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/tls/libnvidia-tls.so.1
Reading symbols from /usr/lib/xorg/modules/extensions/librecord.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/librecord.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//librecord.so
Reading symbols from /usr/lib/xorg/modules/extensions/libdri.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libdri.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//libdri.so
Reading symbols from /usr/lib/libdrm.so.2...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/libdrm.so.2
Reading symbols from /usr/lib/xorg/modules/extensions/libdri2.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libdri2.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/extensions//libdri2.so
Reading symbols from /usr/lib/xorg/modules/drivers/nv_drv.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/drivers/nv_drv.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/drivers//nv_drv.so
Reading symbols from /usr/lib/xorg/modules/libint10.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libint10.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules//libint10.so
Reading symbols from /usr/lib/xorg/modules/libfb.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libfb.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules//libfb.so
Reading symbols from /usr/lib/xorg/modules/libxaa.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libxaa.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules//libxaa.so
Reading symbols from /usr/lib/xorg/modules/input/evdev_drv.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/input//evdev_drv.so
Reading symbols from /usr/lib/xorg/modules/input/synaptics_drv.so...done.
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
Loaded symbols for /usr/lib/xorg/modules/input//synaptics_drv.so
warning: Cannot initialize thread debugging library: generic error
warning: Cannot initialize thread debugging library: generic error
0x00007f59ceb247e6 in G80DispCommand (pScrn=0xd25760, 
    addr=<value optimized out>, data=<value optimized out>)
    at ../../src/g80_display.c:189
189	../../src/g80_display.c: No such file or directory.
	in ../../src/g80_display.c
(gdb) cont
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x00007f59ceb247e0 in G80DispCommand (pScrn=0xd25760, 
    addr=<value optimized out>, data=<value optimized out>)
    at ../../src/g80_display.c:188
188	in ../../src/g80_display.c
(gdb) backtrace full
#0  0x00007f59ceb247e0 in G80DispCommand (pScrn=0xd25760, 
    addr=<value optimized out>, data=<value optimized out>)
    at ../../src/g80_display.c:188
	pNv = (G80Ptr) 0xd25d20
#1  0x00007f59ceb25868 in G80DispInit (pScrn=0xd25760)
    at ../../src/g80_display.c:274
	pNv = <value optimized out>
	val = <value optimized out>
#2  0x00007f59ceb26919 in AcquireDisplay (pScrn=0x7f59cde01024)
    at ../../src/g80_driver.c:511
No locals.
#3  0x00007f59ceb26983 in G80EnterVT (scrnIndex=<value optimized out>, 
    flags=-840953088) at ../../src/g80_driver.c:994
	pScrn = (ScrnInfoPtr) 0xd25760
#4  0x000000000048c352 in CMapEnterVT (index=0, flags=0)
    at ../../../../hw/xfree86/common/xf86cmap.c:455
No locals.
#5  0x0000000000485c3c in xf86Wakeup (blockData=<value optimized out>, 
    err=<value optimized out>, pReadmask=<value optimized out>)
    at ../../../../hw/xfree86/common/xf86Events.c:634
	LastSelectMask = <value optimized out>
	devicesWithInput = {fds_bits = {2, 16188208, 4294967295, 
    140023755816694, 2, 16189936, 4294967295, 140023755736238, 8211912, 
---Type <return> to continue, or q <return> to quit---
    140023755814372, 6, 16189936, 0, 140023755731839, 16189936, 1}}
	pInfo = <value optimized out>
#6  0x0000000000451d1b in WakeupHandler (result=-1, pReadmask=0x7e0760)
    at ../../dix/dixutils.c:418
	i = 0
#7  0x00000000004ee4ef in WaitForSomething (pClientsReady=0xf6f640)
    at ../../os/WaitFor.c:231
	i = -1
	waittime = {tv_sec = 98904436, tv_usec = 5191436}
	wt = (struct timeval *) 0x0
	timeout = <value optimized out>
	clientsReadable = {fds_bits = {0 <repeats 16 times>}}
	clientsWritable = {fds_bits = {71490816, 140023406951314, 49020568, 
    140023404402272, 48, 49020568, 13897456, 71490816, 13981168, 8195424, 
    1152, 5472413, 2, 140023742642688, 17442528, 38159256}}
	curclient = <value optimized out>
	selecterr = 4
	nready = <value optimized out>
	devicesReadable = {fds_bits = {547424, 71490816, 72032320, 
    140023742642688, 5904, 140023739547432, 1280, 4408440, 8248288, 
    140023742642688, 71490816, 13897456, 21920016, 13898112, 13902560, 
    140023739548422}}
	now = <value optimized out>
---Type <return> to continue, or q <return> to quit---
	someReady = 0
#8  0x000000000044dee0 in Dispatch () at ../../dix/dispatch.c:367
	result = 0
	client = (ClientPtr) 0x10a2400
	nready = -1
	start_tick = <value optimized out>
#9  0x0000000000433c5d in main (argc=10, argv=0x7fffdb8a1b88, 
    envp=<value optimized out>) at ../../dix/main.c:397
	i = 1
	alwaysCheckForInput = {0, 1}