Monitor resolution

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Find out your monitor resolution

You need to know what optimum resolution (in pixels) your monitor is capable of. THe best way is to check your monitor manual.

Settings during install

The best way to set your optimum resolution is to make sure you select the correct resolution when you install from CD. When booting the LiveCD, Use F3 at the GRUB boot screen and choose the resolution you need. NOTE: If are install from a Bootable MEPIS USB key, you will need to add a cheatcode in the simple form of res=1440x900, for example, to the boot option line. Once installed, MEPIS will use that resolution as its default. If you did not set the correct resolution during installation, it can still be fixed without reinstalling, so read on.

Using the Live CD to change the resolution

NOTE: this applies only to versions prior to MEPIS 11
If the resolution is not detected automatically, or if you changed your video card, reboot the CD and choose the appropriate resolution by pressing the F3 key at the CD boot screen.

If you already installed MEPIS you don't need to reinstall it, you only need to copy the X configuration file from the CD to the harddisk installation:

  1. Boot CD and pick up the right resolution by pressing F3 at the GRUB boot screen
  2. Once booted, open MEPIS X-Windows Assistant and supply the root password
  3. On the Repair tab, select the drive and partition where MEPIS is installed from the pull-down menus
  4. Click Apply

Changing Settings

In MEPIS 8.5: KMenu -> Settings -> Systems Settings -> General tab -> Display -> Size & Orientation; adjust as needed.
In MEPIS 8: Right-click on Desktop -> Configure Desktop -> Display tab; adjust as needed.
If the desired option is not available read about fixes below.

Xorg -configure

With the release of Debian Lenny and Mepis 8, the dpkg-reconfigure xserver-xorg routine has been replaced by the much simpler Xorg -configure utility - details of how to use this here.


This X extension allows the dynamic alteration of display setup without the need to re-start the X server and can configure dual/multi head setups. See the Xrandr wiki page for more info.

Edit X config file by hand (in case the other tries failed)

  1. Gather monitor information: vertical and horizontal frequencies. Look in the monitor manuals if you still have them or search on the internet.
  2. On K Menu, click Run Command...
  3. Type "kdesu kwrite".
  4. Input the root password.
  5. Open /etc/X11/xorg.conf
  6. Scroll down to Section "Monitor".
  7. Change HorizSync and VertRefresh to the values found in the monitor manual.
  8. Scroll down to Section "Screen".
  9. Add the desired resolution to the "Modes". You should have something like this:
Modes "1280x800""1024x768""800x600"

("1280x800" is presented here only as an example, use your desired resolution -- make sure you change the all the Modes lines. It may be helpful to use the "Find" function under the "Edit" menu to be sure you have located all instances of the Modes lines and/or a particular resolution you wish to disable. For example, if you wish to eliminate 1280x800 as a usable resolution, select edit>find 1280x800 and delete all occurrences in the file.)

Save the file, close all open applications. Restart X with Ctrl-Alt-Backspace.


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