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Home > Archive > Linux Debian support > October 2005 > Ubuntu stays at 640x480 screen resolution.
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Ubuntu stays at 640x480 screen resolution.
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| I have just installed Ubuntu 5.04 on a machine with a 15 inch TFT
monitor, which should run at 1024x768.
Ubuntu won't let me change it.
When I go to preferences - change screen resolution ... the only choice
is 640x480.
The graphics card is a Sapphire ATI Radeon 7000.
What can I do?
--
Chris
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| SINNER 2005-10-06, 5:53 pm |
| * Chris Wrote in alt.os.linux.debian:
> I have just installed Ubuntu 5.04 on a machine with a 15 inch TFT
> monitor, which should run at 1024x768.
>
> Ubuntu won't let me change it.
>
> When I go to preferences - change screen resolution ... the only
> choice is 640x480.
>
> The graphics card is a Sapphire ATI Radeon 7000.
>
> What can I do?
You need to install the ATI drivers. There are many discussions
involving this topic on the Ubuntu forums. A quick google search turns
up a few possibilities. Sorry, I have an Nvidia card or perhaps I could
have been more helpful.
--
David
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| John B 2005-10-06, 8:46 pm |
| Chris wrote:
> I have just installed Ubuntu 5.04 on a machine with a 15 inch TFT
> monitor, which should run at 1024x768.
>
> Ubuntu won't let me change it.
>
> When I go to preferences - change screen resolution ... the only choice
> is 640x480.
>
> The graphics card is a Sapphire ATI Radeon 7000.
>
> What can I do?
It is better to install the drivers as well but I dont think that will
fix your resolution problem (It didnt for me).
You will need to edit your xorg.conf or xfree86.conf (not sure of the
exact names) in /etc/X11 which will determine what resolutions you have
available.
There are sections in there for the vertical and horizontal refresh
ranges as well as the uppper and lower resolutions available at each
colour depth.
Change the upper resolution to your monitors max resolution and you
should then have the option to select a res between the minumum and max.
I dont have a linux box here *sigh* so cant get any specific examples
but heres one off the net for xorg.conf
HTH
JB
<http://www.arl.wustl.edu/~mgeorg/li.../xorg.conf.html>
Check out the section:
Section "Monitor"
# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
HorizSync 31.5 - 50.0
# HorizSync 30-64 # multisync
# HorizSync 31.5, 35.2 # multiple fixed sync frequencies
# HorizSync 15-25, 30-50 # multiple ranges of sync frequencies
# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
VertRefresh 40-90
AND
Section "Screen"
Identifier "Screen 1"
Device "GeForce FX"
Monitor "My Monitor"
# If your card can handle it, a higher default color depth (like 24 or 32)
# is highly recommended.
# DefaultDepth 8
# DefaultDepth 16
DefaultDepth 24
# DefaultDepth 32
# "1024x768" is also a conservative usable default resolution. If you
# have a better monitor, feel free to try resolutions such as
# "1152x864", "1280x1024", "1600x1200", and "1800x1400" (or whatever your
# card/monitor can produce)
Subsection "Display"
Depth 24
#Modes "1440x900" "1024x768" "800x600" "640x480"
Modes "1024x768" "800x600" "640x480"
#Modes "1600x1200"
EndSubsection
EndSection
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