screen resolution problem

Zach netrek at
Thu Feb 28 05:28:25 UTC 2008


For some reason I can get a screen resolution of 1024x768 on my laptop
 if I boot with the Ubuntu 6.06 Live CD (until I get a new machine
following hardware failure), however when I use the Ubuntu 7.04 CD it
forces me to no more than 800x600 (both at 24 bpp color depth). When I
go into System->Preferences->Screen Resolution it doesn't even list
1024x768 as one of the options. I editing /etc/X11/xorg.conf to use
the ati driver, xserver-xorg-video-ati, (I have an ATI Rage Maestro M3
gfx card) but when I log back into X it still won't let me choose
1024x768. I recall there's a way using key commands to change the
resolution mode  back and forth, does anyone know what the key
sequence is? I also recall there is a key sequence that forces X to
restart does anyone know what this is? I would prefer to use Ubuntu
7.04 (6.06 won't allow me to install Adobe Flash Plugin in Firefox fr
some reason) plus in 6.06 I notice this weird jitteriness where the CD
will be caching to the swap and reading/writing into the ramdisk in
physical memory and the mouse cursor will randomly move around - quite
odd. One other problem I notice in 7.04 is that in a certain spot on
the LCD (about 2.5" in from the right side and about half way down I
see this distortion that is moving - it is only a few pixels area but
it cycles through about 1.5 to 2" of the other pixels in the column
going up and down. I don't notice this when booting into the 6.06 Live
CD. I hope it isn't damaging my LCD, I never noticed this problem
until now. Attached is my /etc/X11/xorg.conf which Ubuntu creates.
Here is the lspci info on my gfx card:

01:00.0 VGA compatible controller: ATI Technologies Inc Rage Mobility
M3 AGP 2x (rev 02) (prog-if 00 [VGA])
        Subsystem: Dell Latitude C600
        Flags: bus master, stepping, 66MHz, medium devsel, latency 32, IRQ 11
        Memory at f8000000 (32-bit, prefetchable) [size=64M]
        I/O ports at ec00 [size=256]
        Memory at fdffc000 (32-bit, non-prefetchable) [size=16K]
        [virtual] Expansion ROM at fd000000 [disabled] [size=128K]
        Capabilities: [50] AGP version 2.0
        Capabilities: [5c] Power Management version 2

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