kile@ubuntu:~$ sudo gdb /usr/bin/Xorg
[sudo] password for kile: 
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 "i486-linux-gnu"...
(gdb) handle SIG33 pass nostop noprint
Signal        Stop      Print   Pass to program Description
SIG33         No        No      Yes             Real-time event 33
(gdb) set pagination 0
(gdb) run -keeptty -dumbSched
Starting program: /usr/bin/Xorg -keeptty -dumbSched
[Thread debugging using libthread_db enabled]

This is a pre-release version of the X server from The X.Org Foundation.
It is not supported in any way.
Bugs may be filed in the bugzilla at http://bugs.freedesktop.org/.
Select the "xorg" product for bugs you find in this release.
Before reporting bugs in pre-release versions please check the
latest version in the X.Org Foundation git repository.
See http://wiki.x.org/wiki/GitPage for git access instructions.

X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.1~git20080131-1ubuntu9)
Current Operating System: Linux ubuntu 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686
Build Date: 15 April 2008  05:26:17PM
 
        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: Thu May 29 23:12:06 2008
(==) Using config file: "/etc/X11/xorg.conf"
[New Thread 0xb7cc4a30 (LWP 4510)]
(WW) RADEON: No matching Device section for instance (BusID PCI:1:0:1) found
(II) Module "ddc" already built-in
(II) Module "i2c" already built-in
NTSC PAL 
finished output detect: 0
finished output detect: 1
finished output detect: 2
finished all detect
before xf86InitialConfiguration
in RADEONProbeOutputModes
after xf86InitialConfiguration
(II) Module "ramdac" already built-in
Entering TV Save
Save TV timing tables
saveTimingTables: reading timing tables
TV Save done
disable montype: 1
disable montype: 1
init memmap
init common
init crtc1
init pll1
freq: 135000000
best_freq: 135000000
best_feedback_div: 120
best_ref_div: 12
best_post_div: 2
restore memmap
restore common
restore crtc1
restore pll1
finished PLL1
restore dac
enable montype: 1
disable montype: 1
(II) Module "i2c" already built-in

Program received signal SIGINT, Interrupt.
[Switching to Thread 0xb7cc4a30 (LWP 4510)]
0xb7fdf410 in __kernel_vsyscall ()
(gdb) backtrace full
#0  0xb7fdf410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7e31e99 in ioctl () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0xb7bc8b42 in drmCommandNone () from /usr/lib/libdrm.so.2
No symbol table info available.
#3  0xb7b76a16 in RADEONWaitForIdleCP (pScrn=0x821c098) at ../../src/radeon_commonfuncs.c:256
        ret = -16
        info = (RADEONInfoPtr) 0x821df38
        i = 4104
        __FUNCTION__ = "RADEONWaitForIdleCP"
#4  0xb7b8650f in RADEONResetVideo (pScrn=0x821c098) at ../../src/radeon.h:1164
        info = (RADEONInfoPtr) 0x821df38
        RADEONMMIO = (unsigned char *) 0xb7b44000 <Address 0xb7b44000 out of bounds>
        pPriv = (RADEONPortPrivPtr) 0x8274be8
        tmp = "\230�!\b\230�!\b\000@��P���8�!\b\230�!\b\000@��P���8�!\b,@\000\000\030<ܿ0���\230�!\b\000@��\230�!\bP���\000@��\000@��\230�!\bP���,\000\000\000\\<ܿ8<ܿ��\006�0\016&\b,@\000\000\004\000\000\0000<ܿ\000\000P\002x�'\bh<ܿV�\006��\001\000\000�K'\b\000\000\000\000!�\000\000x�'\b�K'\bh<ܿ\000\000P\002�\001\000\000�K'\b\230<ܿ3D��x�'\b\200\002\000\000�\001\000\000\000\000\000\000\000\000\000\000�\177��"
#5  0xb7b87415 in RADEONInitVideo (pScreen=0x82361b8) at ../../src/radeon_video.c:1624
        pScrn = (ScrnInfoPtr) 0x821c098
        adaptors = <value optimized out>
        newAdaptors = <value optimized out>
        newAdaptor = (XF86VideoAdaptorPtr) 0x0
        num_adaptors = <value optimized out>
#6  0xb7b832c2 in RADEONScreenInit (scrnIndex=0, pScreen=0x82361b8, argc=3, argv=0xbfdc3f24) at ../../src/radeon_driver.c:3491
        pScrn = (ScrnInfoPtr) 0x821c098
        info = (RADEONInfoPtr) 0x821df38
        hasDRI = 1
        i = 2
        subPixelOrder = <value optimized out>
        s = <value optimized out>
#7  0x08073d9c in AddScreen (pfnInit=0xb7b81be0 <RADEONScreenInit>, argc=3, argv=0xbfdc3f24) at ../../dix/main.c:769
        i = 0
        scanlinepad = <value optimized out>
        depth = <value optimized out>
        bitsPerPixel = 32
        k = 2
        pScreen = <value optimized out>
#8  0x080a9c4e in InitOutput (pScreenInfo=0x8209620, argc=3, argv=0xbfdc3f24) at ../../../../hw/xfree86/common/xf86Init.c:850
        i = 0
        j = <value optimized out>
        k = <value optimized out>
        scr_index = 136353312
        modulelist = <value optimized out>
        optionlist = (pointer *) 0x8218a10
        layout = <value optimized out>
        screenpix24 = <value optimized out>
        pix24 = Pix24Use32
        pix24From = X_PROBED
        autoconfig = <value optimized out>
        generation = 1
#9  0x08074526 in main (argc=3, argv=0xbfdc3f24, envp=0xbfdc3f34) at ../../dix/main.c:369
        i = <value optimized out>
        error = 136163204
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb) 
#0  0xb7fdf410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7e31e99 in ioctl () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0xb7bc8b42 in drmCommandNone () from /usr/lib/libdrm.so.2
No symbol table info available.
#3  0xb7b76a16 in RADEONWaitForIdleCP (pScrn=0x821c098) at ../../src/radeon_commonfuncs.c:256
        ret = -16
        info = (RADEONInfoPtr) 0x821df38
        i = 4104
        __FUNCTION__ = "RADEONWaitForIdleCP"
#4  0xb7b8650f in RADEONResetVideo (pScrn=0x821c098) at ../../src/radeon.h:1164
        info = (RADEONInfoPtr) 0x821df38
        RADEONMMIO = (unsigned char *) 0xb7b44000 <Address 0xb7b44000 out of bounds>
        pPriv = (RADEONPortPrivPtr) 0x8274be8
        tmp = "\230�!\b\230�!\b\000@��P���8�!\b\230�!\b\000@��P���8�!\b,@\000\000\030<ܿ0���\230�!\b\000@��\230�!\bP���\000@��\000@��\230�!\bP���,\000\000\000\\<ܿ8<ܿ��\006�0\016&\b,@\000\000\004\000\000\0000<ܿ\000\000P\002x�'\bh<ܿV�\006��\001\000\000�K'\b\000\000\000\000!�\000\000x�'\b�K'\bh<ܿ\000\000P\002�\001\000\000�K'\b\230<ܿ3D��x�'\b\200\002\000\000�\001\000\000\000\000\000\000\000\000\000\000�\177��"
#5  0xb7b87415 in RADEONInitVideo (pScreen=0x82361b8) at ../../src/radeon_video.c:1624
        pScrn = (ScrnInfoPtr) 0x821c098
        adaptors = <value optimized out>
        newAdaptors = <value optimized out>
        newAdaptor = (XF86VideoAdaptorPtr) 0x0
        num_adaptors = <value optimized out>
#6  0xb7b832c2 in RADEONScreenInit (scrnIndex=0, pScreen=0x82361b8, argc=3, argv=0xbfdc3f24) at ../../src/radeon_driver.c:3491
        pScrn = (ScrnInfoPtr) 0x821c098
        info = (RADEONInfoPtr) 0x821df38
        hasDRI = 1
        i = 2
        subPixelOrder = <value optimized out>
        s = <value optimized out>
#7  0x08073d9c in AddScreen (pfnInit=0xb7b81be0 <RADEONScreenInit>, argc=3, argv=0xbfdc3f24) at ../../dix/main.c:769
        i = 0
        scanlinepad = <value optimized out>
        depth = <value optimized out>
        bitsPerPixel = 32
        k = 2
        pScreen = <value optimized out>
#8  0x080a9c4e in InitOutput (pScreenInfo=0x8209620, argc=3, argv=0xbfdc3f24) at ../../../../hw/xfree86/common/xf86Init.c:850
        i = 0
        j = <value optimized out>
        k = <value optimized out>
        scr_index = 136353312
        modulelist = <value optimized out>
        optionlist = (pointer *) 0x8218a10
        layout = <value optimized out>
        screenpix24 = <value optimized out>
        pix24 = Pix24Use32
        pix24From = X_PROBED
        autoconfig = <value optimized out>
        generation = 1
#9  0x08074526 in main (argc=3, argv=0xbfdc3f24, envp=0xbfdc3f34) at ../../dix/main.c:369
        i = <value optimized out>
        error = 136163204
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb) info registers
eax            0xfffffff0       -16
ecx            0x6444   25668
edx            0x0      0
ebx            0xa      10
esp            0xbfdc3b18       0xbfdc3b18
ebp            0xbfdc3b48       0xbfdc3b48
esi            0xfffffff0       -16
edi            0xb7eadf00       -1209344256
eip            0xb7fdf410       0xb7fdf410 <__kernel_vsyscall+16>
eflags         0x3202   [ IF #12 #13 ]
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51
(gdb) thread apply all backtrace

Thread 1 (Thread 0xb7cc4a30 (LWP 4510)):
#0  0xb7fdf410 in __kernel_vsyscall ()
#1  0xb7e31e99 in ioctl () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7bc8b42 in drmCommandNone () from /usr/lib/libdrm.so.2
#3  0xb7b76a16 in RADEONWaitForIdleCP (pScrn=0x821c098) at ../../src/radeon_commonfuncs.c:256
#4  0xb7b8650f in RADEONResetVideo (pScrn=0x821c098) at ../../src/radeon.h:1164
#5  0xb7b87415 in RADEONInitVideo (pScreen=0x82361b8) at ../../src/radeon_video.c:1624
#6  0xb7b832c2 in RADEONScreenInit (scrnIndex=0, pScreen=0x82361b8, argc=3, argv=0xbfdc3f24) at ../../src/radeon_driver.c:3491
#7  0x08073d9c in AddScreen (pfnInit=0xb7b81be0 <RADEONScreenInit>, argc=3, argv=0xbfdc3f24) at ../../dix/main.c:769
#8  0x080a9c4e in InitOutput (pScreenInfo=0x8209620, argc=3, argv=0xbfdc3f24) at ../../../../hw/xfree86/common/xf86Init.c:850
#9  0x08074526 in main (argc=3, argv=0xbfdc3f24, envp=0xbfdc3f34) at ../../dix/main.c:369
(gdb)