Hw to help debug an intel driver problem?

[manu]

	Hi all,
I have a laptop with a 852GM which used to work great with trunk until  
the end of july; well it had a few rough edges when using xrandr too  
much for tooglin between LVDS and VGA but it was OK.
Now since a big update in August viewing a video full screen using Xv  
crashes the server (well xine crashes it right away and mplayer shows  
the video correctly but crashes when exiting), whereas everything was  
fine before (I did not update xine and mplayer in the meantime).
So I decided to bisect the driver, but it does not compile as the other  
modules are too recent. So question is : how to bisect correctly?
Thanks,
Emmanuel

PS: I attach the logs just in case you can already do something with  
them
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# /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 xorg.conf(5) manual page.
# (Type "man 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	"/usr/share/fonts/X11/misc"
	FontPath	"/usr/share/fonts/X11/cyrillic"
	FontPath	"/usr/share/fonts/X11/100dpi/:unscaled"
	FontPath	"/usr/share/fonts/X11/75dpi/:unscaled"
	FontPath	"/usr/share/fonts/X11/Type1"
	FontPath	"/usr/share/fonts/X11/100dpi"
	FontPath	"/usr/share/fonts/X11/75dpi"
	# path to defoma fonts
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
	ModulePath      "/usr/local/lib/xorg/modules,/usr/lib/xorg/modules/"
EndSection

Section "Module"
	Load	"i2c"
	Load	"bitmap"
	Load	"ddc"
	Load	"dri"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"vbe"
	Load	"synaptics"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"us"
	Option		"XkbVariant"	"alt-intl"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"ZAxisMapping"		"4 5"
	Option		"Emulate3Buttons"	"true"
EndSection

Section "InputDevice"
	Identifier	"Synaptics Touchpad"
	Driver		"synaptics"
	Option		"SendCoreEvents"	"true"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"auto-dev"
	Option		"ZAxisMapping"		"4 5"
	Option		"HorizScrollDelta"	"0"
	Option		"SHMConfig"		"on"
EndSection


Section "Device"
	Identifier	"Intel Corporation 82852/855GM Integrated Graphics Device"
	Driver		"intel"
	BusID		"PCI:0:2:0"
#	Option		"FramebufferCompression" "FALSE"
#	Option		"Tiling"		 "FALSE"
#	Option		"AccelMethod"		 "XAA"
EndSection

Section "Monitor"
	Identifier	"Monitor-VGA"
#	Option		"DPMS"
	HorizSync	28-64
	VertRefresh	43-60
 	Modeline 	"1360x768_60.00"  84.72  1360 1424 1568 1776  768 769 772 795  -HSync +Vsync
	Option		"PreferredMode" "1360x768_60.00"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Intel Corporation 82852/855GM Integrated Graphics Device"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x768"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x768"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x768"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1280x768"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x768"
	EndSubSection
	SubSection "Display"
		Depth		24
		Virtual		1536 1536
		Modes		"1360x768_60.00" "1280x768"
	EndSubSection
EndSection

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

Section "DRI"
	Mode	0666
EndSection

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