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I have some problem with resolution. My monitor resolution is 1920x1080. At first when I installed ubuntu i had 800x600.. Now, after installing AMD driver, I only have 1600x1200 to choose like max resolution. Why is that? What should I do?

Any answer will be helpful :)

P.S. My graphic card is Sapphire radeon HD 7850 (1Gb)

Naz
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Milos Manojlovic
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  • http://askubuntu.com/questions/377937/how-to-set-a-custom-resolution/377944#377944 – Naz Jun 08 '15 at 18:53

1 Answers1

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Here are the steps

  1. Use xrandr to make sure that the new mode can fit within the maximum framebuffer size 
xrandr | grep maximum

2. Use gtf to create a mode line

gtf 1920 1080 60

3. Add new mode using xrandr

xrandr --newmode "1920x1080_60" 173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

4. Add this newly added mode to the desired output (VGA/LVDS etc)

xrandr --addmode VGA 1920x1080_60

5. Choose the new mode

xrandr --output VGA --mode 1920x1080_60
Naz
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  • Thanks man! :) I do that, all. Now I have to choose for 1920x1080, but it looks like 4:3, not 16:9, how is that possible ? Do you have maybe some solution for that?

    Really appreciate your help!

     – Milos Manojlovic Jun 08 '15 at 20:43
  • please try again i edited some values in my answer. – Naz Jun 09 '15 at 00:15
  • xrandr --output CRT1 --mode 1920x1080_60 xrandr: Configure crtc 0 failed

    Nothing happend.. it same..

     – Milos Manojlovic Jun 11 '15 at 11:29