Ubuntu: Monitor Resolution problem in Xubuntu 15.04


I'm new in this forum and even a beginner with ubuntu.

I've already tried to set the resolution of my monitor to 1440x900 but I can't get on because xrandr shows me error messages like:

xrandr: Failed to get size of gamma for output default  xrandr: Configure crtc 0 failed

Here there is the output of xrandr

Screen 0: minimum 640 x 480, current 1280 x 1024, maximum 1440 x 1024  default connected 1280x1024+0+0 0mm x 0mm     1280x1024       0.0*      1024x768        0.0       800x600         0.0       640x480         0.0

As I said before, I would like to set resolution to 1440x900. Can anyone please help me to resolve this situation?


Create a xorg.conf file in \etc\X11 with the the following contents:

Section "Screen"      Identifier   "Screen0"      Device       "Device0"      Monitor      "Montior0"      DefaultDepth 24      Subsection   "Display"          Depth      24          Modes      "1024 x 768" "1440 x 900"      EndSubsection  EndSection    Section "Monitor"      Identifier  "Monitor01"      VendorName  "Monitor0"      ModelName   "Model0"      HorizSync   30 - 300      VertRefresh 30 - 500      Modeline    "1440x900_60.00"  129.00  1440 1528 1680 1920  1080 1083 1087 1120 -hsync +vsync  EndSection

Change the Modeline part so that it contains the output of your cvt 1440 900 command.
Reboot and try your xrandr commands again.
If you boot into a TUI, you can remove the xorg.conf file with:

sudo rm /etc/X11/xorg.conf  

NOTE: The ideal situation would be to google the name of your monitor, get the horizontal sync and vertical refresh rates and replace the default values above.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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