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Bug#604897: xserver-xorg-core: Segmentation fault on Squeeze with radeon



Cyril Brulebois wrote:
> Tobias Nissen <tn@movb.de> (25/11/2010):
>> Backtrace:
>> 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80adebb]
>> 1: /usr/bin/X (0x8048000+0x5aa95) [0x80a2a95]
>> 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb786740c]
>> 3: /usr/lib/xorg/modules/extensions/libglx.so (0xb7421000+0x3fc24)
>> [0xb7460c24] 4: /usr/lib/xorg/modules/extensions/libglx.so
>> (0xb7421000+0x364f2) [0xb74574f2] 5: /usr/bin/X
>> (InitExtensions+0x85) [0x80cb3a5] 6: /usr/bin/X (0x8048000+0x1e80d)
>> [0x806680d] 7: /lib/i686/cmov/libc.so.6 (__libc_start_main+0xe6)
>> [0xb759bc76] 8: /usr/bin/X (0x8048000+0x1e5a1) [0x80665a1]
>> Segmentation fault at address (nil)
> 
> Sounds like #604265. It would be nice to have a full backtrace.

OK, I got this:

hal:/home/tobi# gdb Xorg
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 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".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/Xorg...Reading symbols from /usr/lib/debug/usr/bin/Xorg...done.
(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/Xorg
[Thread debugging using libthread_db enabled]

X.Org X Server 1.7.7
Release Date: 2010-05-04
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.32.25-dsa-ia32 i686 Debian
Current Operating System: Linux hal 2.6.36-rc6-686 #1 SMP Mon Oct 4 10:25:13 UTC 2010 i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.36-rc6-686 root=UUID=ac9aa2af-53fc-41bb-9880-7fb72852b900 ro quiet no_console_suspend=1 acpi_sleep=s4_nohwsig
Build Date: 12 November 2010  12:21:56AM
xorg-server 2:1.7.7-9 (Julien Cristau <jcristau@debian.org>)
Current version of pixman: 0.16.4
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
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: Fri Nov 26 13:52:27 2010
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
[tcsetpgrp failed in terminal_inferior: Operation not permitted]
(II) [KMS] drm report modesetting isn't supported.
(EE) open /dev/fb0: No such file or directory
  XRANDR name: VGA-0
  Connector: VGA
  CRT1: INTERNAL_KLDSCP_DAC1
  DDC reg: 0x7e40
  XRANDR name: LVDS
  Connector: LVDS
  LCD1: INTERNAL_LVTM1
  DDC reg: 0x7e60
  XRANDR name: DVI-0
  Connector: DVI-I
  DFP1: INTERNAL_KLDSCP_TMDS1
  DDC reg: 0x7e50
Dac detection success
finished output detect: 0
finished output detect: 1
Unhandled monitor type 0
finished output detect: 2
finished all detect
Dac detection success
Unhandled monitor type 0
Output LCD1 disable success
Blank CRTC 0 success
Disable CRTC 0 success
Blank CRTC 1 success
Disable CRTC 1 success
Output CRT1 disable success
Output LCD1 disable success
Blank CRTC 0 success
Disable CRTC 0 success
Blank CRTC 1 success
Disable CRTC 1 success
Output LCD1 disable success
Blank CRTC 0 success
Disable CRTC 0 success
Mode 1400x1050 - 1688 1066 10
Picked PLL 0
best_freq: 108000
best_feedback_div: 80
best_frac_feedback_div: 0
best_ref_div: 2
best_post_div: 10
Set CRTC 0 PLL success
Set CRTC Timing success
Set CRTC 0 Overscan success
Not using RMX
scaler 0 setup success
Set CRTC 0 Source success
crtc 0 YUV disable setup success
Output digital setup success
Output LCD1 enable success
Enable CRTC 0 success
Unblank CRTC 0 success
Output CRT1 disable success
Blank CRTC 1 success
Disable CRTC 1 success
SELinux: Disabled on system, not enabling in X server

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
#1  0xb7bdbc24 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#2  0xb7bd24f2 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#3  0x080cb3a5 in InitExtensions (argc=1, argv=0xbffff6e4) at ../../../../mi/miinitext.c:565
#4  0x0806680d in main (argc=1, argv=0xbffff6e4, envp=0xbffff6ec) at ../../dix/main.c:205
(gdb) bt full
#0  0x00000000 in ?? ()
No symbol table info available.
#1  0xb7bdbc24 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
No symbol table info available.
#2  0xb7bd24f2 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
No symbol table info available.
#3  0x080cb3a5 in InitExtensions (argc=1, argv=0xbffff6e4) at ../../../../mi/miinitext.c:565
        listInitialised = 1
#4  0x0806680d in main (argc=1, argv=0xbffff6e4, envp=0xbffff6ec) at ../../dix/main.c:205
        i = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb)

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