Screen size locked at 640 x 480

[minsin]

My screen resolution is supposed to be 1024 x 768 something but my screen size is fixed at 640x480. I'm on two monitors because my laptop screen broke so I got an external monitor to connect with my laptop. How do I make it so only the external monitor's screen size is 1024x 768?

[arochester]

Re: Screen size locked at 640 x 480

Click "System Settings"
Click on "Display"
The front tab is Size, Orientation and Positioning
Click on Administrator Mode and give your password
Try changing the Screen Size

[buzo]

Re: Screen size locked at 640 x 480

I have the same problem under a different scenario. I am running a virtual machine using VMWare Player: I succesfully installed Kubuntu, and the desktop was significantly smaller than the size of my Monitor, but it was still visible.

I started playing around with the "System Settings" options, in an effort to stretch my desktop to a full 1280x1024. Somehow the desktop got locked to 640x480, and I cannot move the scroll bar (under "Size, Orientation and Positioning" tab within "Display"), even when I'm sudo.

Any ideas?

Thanks

[underdog5004]

Re: Screen size locked at 640 x 480

I've got the same problem with my (930Mhz ATI 128 Rage 512Mb 20Gb Dapper) Computer...I fixed it by making the monitor be specified as a 1024x768 @75Hz Generic Monitor...but my login screen is still 640x480...how can I fix this?

[fluffy]

Re: Screen size locked at 640 x 480

The problem *might* be with you /etc/X11/xorg.conf file.
First of all, back it up

sudo cp /etc/X11/xorg.conf /etx/X11/xorg.conf.BACKUP

Next you want to get your monitors horizontal and vertical refresh rates. You can probably get them by googling.

Then have a look here

http://www.ubuntuforums.org/showthre...ight=xorg.conf

Now examine your own xorg.conf file. You will have to sudo to edit it.
Look for something like
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 31-70
VertRefresh 55-90
EndSection

You should make sure that HorizSync and VertRefresh contain the numbers for *your* monitor.

Next look for...
DefaultDepth 24 (your default depth may be different)
Then look for
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection

The first numbers in Modes set the default resolution, so you may need to change that. E.g. if you want 1280x1024 you would change the line to read
Modes "1280x1024" "1024x768" "800x600" "640x480"

Finally make sure that in...

Section "Device"
Identifier "ATI Technologies, Inc. RV350 AS [Radeon 9600]"
Driver "ati"
BusID "PCI:1:0:0"
EndSection

the 'Driver' setting is correct for your card.

You will need to restart X to see if this works.
Peronally I login at the console and then
sudo killall kdm
sudo kdm