Strange resolution problem

[Guest]

Hy,
I'm new in Kubuntu (so I guess its' the good place to post...) and I have a strange resolution problem : the low part of my screen and the left part are not visible.
It's seems like if the image was too large for my screen.
So, I tried to change my screen resolution (I'm on 1280x1024) but I only obtained a dark screen and no way to go back (apart a reboot).
So I look in numerous forums to find a way....
I change the file xorg.conf (copy at the end of the post) but I always have the same problem.
I also tried to change the graphic driver but the problem was the same.
The strange thing is that when I try to change resolution (in Monitor & Display), I could decide between these :
1280 x 1024
1152 x 864
1024 x 768
832 x 624...
But the second, the fourth, ... are not defined in the xorg.conf file (described at the end of the post) ... is that possible ??
So if anyone could help me....
Seb

Section "Files"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"fr"
	Option		"XkbVariant"	"oss"
	Option		"XkbOptions"	"lv3:ralt_switch"
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"
	Driver		"wacom"
	Identifier	"stylus"
	Option		"Device"	"/dev/input/wacom"
	Option		"Type"	"stylus"
	Option		"ForceDevice"	"ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
	Driver		"wacom"
	Identifier	"eraser"
	Option		"Device"	"/dev/input/wacom"
	Option		"Type"	"eraser"
	Option		"ForceDevice"	"ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
	Driver		"wacom"
	Identifier	"cursor"
	Option		"Device"	"/dev/input/wacom"
	Option		"Type"	"cursor"
	Option		"ForceDevice"	"ISDV4"# Tablet PC ONLY
EndSection

Section "Device"
	Identifier	"ATI Technologies Inc Radeon R200 QM [Radeon 9100]"
	Boardname	"ati"
	Busid		"PCI:1:0:0"
	Driver		"ati"
	Screen	0
	Option		"MergedFB"	"off"
  	Option "UseEDID" "FALSE"
  	Option "UseDisplayDevice" "DFP"
  	Option "UseEDIDFreqs" "FALSE"
  	Option "ModeValidation" "NoEdidModes"
EndSection

Section "Monitor"
	Identifier	"L1919S"
	Vendorname	"Generic LCD Display"
	Modelname	"LCD Panel 1280x1024"
	Horizsync	30.0 - 83.0
	Vertrefresh	56.0 - 75.0
 modeline "640x480@60" 25.2 640 656 752 800 480 490 492 525 -vsync -hsync
 modeline "800x600@60" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
 modeline "1024x768@60" 65.0 1024 1048 1184 1344 768 771 777 806 -vsync -hsync
 modeline "1280x1024@60" 108.0 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync
	Gamma	1.0
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"ATI Technologies Inc Radeon R200 QM [Radeon 9100]"
	Monitor		"L1919S"
	Defaultdepth	24
	SubSection "Display"
		Depth	24
		Virtual	1280	1024
		Modes		"1280x1024@60"	"1024x768@60"	"800x600@60"	"640x480@60"
	EndSubSection
	SubSection "Display"
		Depth	16
		Virtual	1280	1024
		Modes		"1280x1024@60"	"1024x768@60"	"800x600@60"	"640x480@60"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
 screen 0 "Default Screen" 0 0
	Inputdevice	"Generic Keyboard"
	Inputdevice	"Configured Mouse"
	
	# Uncomment if you have a wacom tablet
	#	InputDevice   "stylus"	"SendCoreEvents"
	#	InputDevice   "cursor"	"SendCoreEvents"
	#	InputDevice   "eraser"	"SendCoreEvents"
EndSection
Section "Module"
	Load		"glx"
	Load		"GLcore"
	Load		"v4l"
EndSection
Section "ServerFlags"
EndSection

[dibl]

Re: Strange resolution problem

That is an unusual problem description. I don't know much about the ATI cards, but I wonder if the correct driver/version is installed? If you're in doubt about that, I would recommend the Envy installer -- it will give you choices if there is more than one driver that will work. Get Envy here:

http://albertomilone.com/nvidia_scripts1.html

[Guest]

Re: Strange resolution problem

Section "Device"
Identifier "ATI Technologies Inc Radeon R200 QM [Radeon 9100]"
Boardname "ati"
Busid "PCI:1:0:0"
Driver "ati"
Screen 0
Option "MergedFB" "off"
Option "UseEDID" "FALSE"
Option "UseDisplayDevice" "DFP"
Option "UseEDIDFreqs" "FALSE"
Option "ModeValidation" "NoEdidModes"
EndSection

Looks like the highlited sections of your xorg.conf's device section have disabled EDID. EDID lets you display tell your computer what resolutions it supports at what frequencies.
see this link for more info. http://en.wikipedia.org/wiki/Extende...ification_data
Another option is to just rename your xorg.conf to somthing like 'xorg.conf.backup' then restart X. The system should generate a new config file with its best guest setting.