hoseini wrote:

I mean I can change resolution just with these two commands or no we have more commands.

From the xrandr manual:

xrandr - primitive command line interface to RandR extension

There might be another programan that works with RandR but I know no other in the command line.

my english is very bad, but i think:
change your xorg.conf

edit this file and you can see this, roughly:

Section "Screen"

   Identifier   "Default Screen"

   Device      "ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]"

   Monitor      "Monitor genérico"

   DefaultDepth   24

   SubSection "Display"

      Depth      1

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

   SubSection "Display"

      Depth      4

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

   SubSection "Display"

      Depth      8

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

   SubSection "Display"

      Depth      15

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

   SubSection "Display"

      Depth      16

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

   SubSection "Display"

      Depth      24

      Modes      "1024x768" "800x600" "640x480"

   EndSubSection

EndSection

and then you only chage the eight line, only add "1280x800"

and your new file is it:

Section "Screen"

   Identifier   "Default Screen"

   Device      "ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]"

   Monitor      "Monitor genérico"

   DefaultDepth   24

   SubSection "Display"

      Depth      1

      Modes     "1280x800" "1024x768" "800x600" "640x480"

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