Personal Blog of Emre YaÅŸar

It’s very easy to use sax or sax2 tool for configuring screen resolution, monitor dimension, etc for X session.

Or you may modify the xorg.conf file for this purpose.

But, it’s too bothersome to see a warning message about your “high resolution” at the center of monitor if you are using a KVM-over-IP switch like Raritan or Avocent. Also you are in text mode…

So, do you know a tool for modifying the resolution of your console (tty1, tty2, ..) resolution.

You may change your resolution of your console by editing the kernel parameter only.

You must have a look at your boot manager’s (GRUB/LILO) configuration file first.

For instance, if you use GRUB, you have to look for the value of VGA parameter at /boot/grub/menu.lst file.

You may change the value of VGA for best performance according to your hardwares.

You must enter a hexadecimal value for VGA parameter.

Have a look at the table below..

Colours   640×400 640×480 800×600 1024×768 1152×864 1280×1024
——–+—————————————————-
4 bits |    ?       ?     0×302      ?        ?        ?
8 bits |  0×300   0×301   0×303    0×305    0×161    0×307
15 bits |    ?     0×310   0×313    0×316    0×162    0×319
16 bits |    ?     0×311   0×314    0×317    0×163    0×31A
24 bits |    ?     0×312   0×315    0×318      ?      0×31B
32 bits |    ?       ?       ?        ?      0×164      ?