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[Joe Batt <joe@xxxxxxxxxxxxxxx>]

It's not too hard to reproduce.  Just run 'Xdmx :1 -display :0'.

In an up to date Jaunty install...

battjt@dale:~/workspace/CL$ gdb Xdmx
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"...
(no debugging symbols found)
(gdb) r :1 -display :0
Starting program: /usr/bin/Xdmx :1 -display :0
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
---Type <return> to continue, or q <return> to quit---
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
(no debugging symbols found)
(no debugging symbols found)
(II) dmx: Generation:         1
(II) dmx: DMX version:        1.2.20070424 (DMX Project)
(II) dmx: DMX Build OS:       Linux 2.6.24-23-server i686 (Ubuntu)
(II) dmx: DMX Build Compiler: gcc 4.3.3
(II) dmx: DMX Execution OS:   Linux 2.6.28-15-generic #49-Ubuntu SMP Tue 
Aug 18 18:40:08 UTC 2009
(II) dmx: DMX Execution Host: dale
(II) dmx: MAXSCREENS:         16
(II) dmx: Using configuration from command line
(II) dmx: Added :0 at 0 0
(II) dmx[o0/:0]: No Xdmx server running on backend
(II) dmx[o0/:0]: Name of display: :0.0
(II) dmx[o0/:0]: Version number:  11.0
(II) dmx[o0/:0]: Vendor string:   The X.Org Foundation
(II) dmx[o0/:0]: Vendor release:  10600000
(II) dmx[o0/:0]: Dimensions:      1440x900 pixels
(II) dmx[o0/:0]: 7 depths on screen 0:  24,1,4,8,15,16,32
(II) dmx[o0/:0]: Depth of root window:  24 planes (24)
(II) dmx[o0/:0]: Number of colormaps:   1 min, 1 max
(II) dmx[o0/:0]: Options: backing-store no, save-unders no
(II) dmx[o0/:0]: Window Manager running: yes
(**) dmx[o0/:0]: Window manager running -- colormaps not supported
(II) dmx[o0/:0]: 1440x900+0+0 on 1440x900 at depth=24, bpp=32
(II) dmx[o0/:0]: 0x21 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff *
(II) dmx[o0/:0]: 0x22 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x92 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x93 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x94 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x95 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x96 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x97 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x98 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x99 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9a TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9b TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9c TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9d TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9e TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x9f TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa0 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa1 TrueColor   24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa2 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa3 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa4 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa5 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa6 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa7 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa8 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xa9 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xaa DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xab DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xac DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xad DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xae DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xaf DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xb0 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xb1 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0xb2 DirectColor 24b 8b/rgb 256 0xff0000 0xff00 0x00ff
(II) dmx[o0/:0]: 0x6d TrueColor   32b 8b/rgb 256 0xff0000 0xff00 0x00ff
[New Thread 0xb79046d0 (LWP 29317)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb79046d0 (LWP 29317)]
0x0815d26a in dixRequestPrivate ()
(gdb) bt
#0  0x0815d26a in dixRequestPrivate ()
#1  0x0807b53b in dmxInitGC ()
#2  0x0808365b in dmxScreenInit ()
#3  0x0815c48d in AddScreen ()
#4  0x0807e87a in InitOutput ()
#5  0x0815cb81 in main ()
(gdb) quit


Joe

Bryce Harrington wrote:
> This bug seems to be pretty ancient; I'm guessing if it were still
> relevant we'd have seen more recent comments.  In any case the
> backtraces have bitrotted; they no longer point into the right
> functions.  So presumably code's been changed which has made this bug go
> away.
>
> If I'm wrong and the bug can be reproduced on Karmic, feel free to
> reopen and attach a fresh Backtrace.  A fresh Xorg.0.log couldn't hurt
> either.
>
> ** Changed in: xorg-server (Ubuntu)
>        Status: Triaged => Invalid
>
>

-- 
Xdmx crashed with SIGSEGV in dmxCreateGC()
https://bugs.launchpad.net/bugs/281077
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