Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I just installed Ubuntu on my laptop. The screen resolution is stuck in 1024x768. The screen is made for 1280x800. When I run xrandr I get:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
   1024x768       61.0* 
   800x600        61.0

1280x800 isn't offered and I get gamma size error. I was going to look into the Xorg.conf file but I couldn't locate it.

1280x800 was displayed in Windows 7 and I think it is being displayed in Grub before Ubuntu starts also. Here are some details about my computer:

  • CPU: Intel atom D2500 1.86GHz
  • Chipset: Intel 945GSE+ICH7M
  • LCD: 14" TFT 16:9
  • Resolution ratio: 1280*800
  • Video Card: Intel integrated GMA950

Does anyone know how to fix this?

share|improve this question

1 Answer 1

Refer to choosing correct driver package here: Linux Graphics Drivers from Intel

Possible solution is:

sudo dpkg-reconfigure -phigh xserver-xorg
sudo reboot

Other way:

Step 1. Create mode line by using gtf

Thus if your output have 61.0Hz frequency:

gtf 1280 800 61.0 - this command will calculate your Modeline for 1280x800

Step 2. Create new mode for xrandr

xrandr --newmode <value of your modeline without word "Modeline">

Step 3. Add new mode to output

xrandr --addmode VGA 1280x800_61.00 

And if commands above DON'T bring any errors:

Step 4. Choose your new mode

xrandr --output VGA --mode 1280x800_61.00
share|improve this answer
    
I get an error about 'xserver-xorg' isn't installed. How do I fix it? –  Jack Apr 18 at 4:04

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.