Bug#629611: xserver-xorg: reproducible X server segfault

[pacman@kosh.dhis.org]

Julien Cristau writes:
> 
> On Tue, Jun  7, 2011 at 23:56:08 -0500, Alan Curry wrote:
> 
> > Xorg X server configuration file status:
> > ----------------------------------------
> > -rw------- 1 root root 3981 Feb  8 22:05 /etc/X11/xorg.conf
> > 
> > Contents of /etc/X11/xorg.conf:
> > -------------------------------
> 
> Please attach that file.

I'll include it with this message, but first something more important: I
can't reproduce this bug anymore. It was very reliable a few months ago,
but now it doesn't happen. I still see garbage drawn on the screen but
the X server doesn't crash.

I don't know what changed. xserver-xorg and xli haven't been upgraded. I
have a newer kernel, which seems pretty far removed from where the
problem was. I guess the non-crashing X server will make it easier to
trace what crazy requests xli is sending.

Here's the config file. It's crufty since it's been through a few
upgrades and I've edited it whenever it stopped working instead of
creating a fresh one. reportbug didn't get it the first time because it
wasn't world-readable for some reason.

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
	FontPath	"unix/:7100"			# local font server
        # if the local font server has problems, we can fall back on these
	FontPath	"/usr/share/fonts/X11/misc"
	FontPath	"/usr/X11R6/lib/X11/fonts/misc"
	FontPath	"/usr/share/fonts/X11/cyrillic"
	FontPath	"/usr/X11R6/lib/X11/fonts/cyrillic"
	FontPath	"/usr/share/fonts/X11/100dpi/:unscaled"
	FontPath	"/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/share/fonts/X11/75dpi/:unscaled"
	FontPath	"/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/share/fonts/X11/Type1"
	FontPath	"/usr/X11R6/lib/X11/fonts/Type1"
	FontPath	"/usr/share/fonts/X11/100dpi"
	FontPath	"/usr/X11R6/lib/X11/fonts/100dpi"
	FontPath	"/usr/share/fonts/X11/75dpi"
	FontPath	"/usr/X11R6/lib/X11/fonts/75dpi"
	# path to defoma fonts
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
	Load	"GLcore"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Disable	"dri"
	Disable	"dri2"
	Load	"extmod"
	Load	"freetype"
	Disable	"glx"
	Disable	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
        SubSection "extmod"
                Option "omit XFree86-DGA"
        EndSubSection
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	#Driver		"keyboard"
	#Driver		"kbd"
	Driver		"evdev"
	Option		"Device"	"/dev/input/event0"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	#Option		"XkbModel"	"macintosh"
	Option		"XkbModel"	"hhk"
	Option		"XkbLayout"	"us"
	Option		"XkbOptions"	"terminate:ctrl_alt_bksp"
        Option          "AutoRepeat"    "250 30"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	#Option		"Device"		"/dev/ttyS0"
	#Option		"Protocol"		"MouseSystems"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"PS/2"
	Option		"Emulate3Buttons"	"false"
	Option		"ZAxisMapping"		"4 5"
EndSection

Section "Device"
	Identifier	"Generic Video Card"
	Driver		"radeon"
	Option		"UseFBDev"		"false"
	Option		"EnablePageFlip"	"true"
        Option          "ForceMinDotClock"      "15749k"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	28-50
	VertRefresh	43-86
	Option		"DPMS"
        ModeLine "320x200"      15.75    320  344  376  412    200  208  210  222 -hsync +vsync doublescan
        ModeLine "640x480"      36.00    640  672  728  832    480  481  484  509 -hsync -vsync
        ModeLine "800x600"      49.50    800  848  928 1056    600  605  608  633 +hsync +vsync
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Generic Video Card"
	Monitor		"Generic Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
EndSection