View Full Version : [ubuntu] 9.04 Dell C640 ATI 7500 Radeon Resolution "stuck" at 1024x768

May 6th, 2009, 12:41 PM
After reading multiple threads and trying 3 different howto's, reinstalling Ubuntu for the 5'th time.

I realy like to shout out, can someone help me getting a better resulotion than 1024x768 on my Dell C640 ?

It seems that in Ubuntu 6.10 this was no problem: http://ubuntuforums.org/showthread.php?t=429425

I am understanding the /etc/X11/xorg.conf and i'am also able to analyse the /var/log/Xorg.0.log

Installed the radeon driver fron catalyst 9.3 This one is able to play with my ATI 7500 I can see in the log file that the correct driver is loaded, no errors at that point. I used this procedure: http://wiki.cchtml.com/index.php/Ubuntu_Jaunty_Installation_Guide#Installing_the_dr ivers_manually

What i thought i would be: the display max resolution is set to 1024x768 via the BIOS of the machine. So i added a extra line in xorg.conf -> in device: Option "PanelSize" "1400x1050"

This results in a bigger panel screen layout, i mean i now can choose the 1400x1050 resolution but it just magnifies the desktop, i hoped the txt and icons would be smaller with this resolution :(

When i used xrandr to change between resolution this also dont give the good resolution :(

Maybe someone who ownes a C640 does know the resolution.

Thanks in advance,

PS: i can post my xorg.conf and Xorg.0.log

May 6th, 2009, 08:47 PM
I added the log and xorg.conf in the packed file.

Please take a look at my files:

# xorg.conf (X.Org 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 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.
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
# 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 "Monitor"
Identifier "Dell Monitor"
HorizSync 31.5 - 90.0
VertRefresh 59.0-75.0

Section "Screen"
Identifier "Default Screen"
Monitor "Dell Monitor"
Device "7500"
DefaultDepth 16
# Option "NoDDC"
SubSection "Display"
Modes "1400x1050" "1280x1024" "1280x960" "1024x768" "1152x864" "800x600" "640x480"

Section "Module"
Load "dri"
Load "extmod"
Load "glx"
Load "GLcore"

Section "DRI"
Mode 0666

Section "Device"
Identifier "7500"
Driver "radeon"
BusID "PCI:1:0:0"
Option "PanelSize" "1400x1050"
Option "AGPMode" "4"
Option "AGPFastWrite" "on" #Faster than default (off)
Option "SWcursor" "off" #Faster than default (on)
Option "EnablePageFlip" "on" #Faster than default (off)
Option "AccelMethod" "XAA" # or XAA, EXA, XAA more stable, XAA is deafult
Option "DynamicClocks" "on"
Option "BIOSHotkeys" "on"
Option "AGPSize" "64" # default: 8
Option "EnableDepthMoves" "true"
Option "VideoKey" "0x01"
# Option "NoDDC"
#Identifier "ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500]"
#Optimized values (changed from driver default)
#Left to driver default
# Option "RenderAccel" "on" #Default is "on"
# Option "DMAForXv" "on" #Default is on, use default value
# Option "SubPixelOrder" "RGB" #Force subpixel order to specified order. The default is NONE for CRT, RGB for digital panels, use default value
# Option "ColorTiling" "on" # Frame buffer can be addressed either in linear or tiled mode.The default value is on. Use default value.
# Option "DDCMode" "off" #Force to use the modes queried from the connected monitor. The default is off, use default value
#These are not mentioned in man page for driver