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I need some help fixing my resolution. It's stuck at 1024x768, but yesterday it was working well on 1280x1024. I'm using ATI HD2600, and I know that XUbuntu has some problems with ATI.I want to add 1280x1024 resolution.

Here is the output of xrandr:

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
DIN disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)  
DVI-1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768       60.0*     
800x600        60.3     56.2     
848x480        60.0      
640x480        59.9

xorg.conf is also missing from it's location. Also I tried adding:

xrandr --addmode VGA1 1280x1024
xrandr --addmode LVDS 1280x1024

and it didn't work either. I tried installing Catalyst from AMD but still no luck with it. I'm a noob on Ubuntu, and I can't find any solutions to this, please help me!

Marian Ioan
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2 Answers2

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Does the Display / Screen / Monitors settings page (whatever it's called in your DE) have any options to change resolution, & do they work?

And according to xrandr there you should have 4 resolutions available, have you tried changing it with xrandr, maybe with xrandr -s 800x600 or whichever you want, with/without -r 60?

For a different mode, not listed in xrandr yet, first try: 

xrandr --addmode DVI-1 1280x1024

I'm not sure, but I think to add the new mode permanently you'll have to use xrandr's --newmode that uses "ModeLine syntax for xorg.conf".
Then:

xrandr -s 1280x1024

See this Q & A for more info But in that one xrandr already lists the wanted resolution, just no refresh rate. In this case, xrandr doesn't list 1280x1024 at all, so it refuses to --addmode for it...

Maybe it is a driver issue, could try updating graphic drivers, any updates to packages waiting? (apt-get update or upgrade all packages with apt-get upgrade) Or checked "Driver Manager" or "Additional Drivers" (or whatever it's called now) for adding hardware drivers? Some AMD graphics use the fglrx package, but I'm not sure for yours.

Community
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Xen2050
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  • Sorry for didn't mentioning.I want to add a 1280x1024 resolution – Marian Ioan Dec 15 '14 at 19:06
  • edited more addmode – Xen2050 Dec 15 '14 at 19:19
  • xrandr: cannot find mode "1280x1024", any suggestions? – Marian Ioan Dec 15 '14 at 19:20
  • Does the monitor even support 1280x1024, it works in windows & everything? And in case the monitor or driver just won't cooperate, did the monitor change to any other resolutions like 800x600? with xrandr -s 800x600? – Xen2050 Dec 15 '14 at 19:24
  • yea, sice today, I was running 1280x1240, and after closing my pc, the max resolution available it's 1024x768.And yes, xrandr -s 800x600 is working – Marian Ioan Dec 15 '14 at 19:28
  • Ok, so at least it's not "stuck" in 1024x768. How about xrandr --addmode DVI-1 "1280x1024_60.00" or xrandr --addmode "DVI-1 1280x1024_60.00" or xrandr --addmode "DVI-1" "1280x1024_60.00" (in case quoting) – Xen2050 Dec 15 '14 at 19:38
  • still no luck.xrandr: cannot find mode "1280x1024_60.00" – Marian Ioan Dec 15 '14 at 19:46
  • hmmm, added a more detailed related Q. And since you can change the resolution, it's not stuck, you could edit your Q to reflect/clarify? – Xen2050 Dec 15 '14 at 19:50
  • I saw these question, but nothing from there didn't worked for me.I will edit my question, and thank you for your time.I really appreciate your help – Marian Ioan Dec 15 '14 at 19:57
  • Let us continue this discussion in chat. – Marian Ioan Dec 15 '14 at 20:12
  • I think I see why the --addmode wouldn't work, updated A. Next idea: updated packages (apt-get update or upgrade all packages with apt-get upgrade) or additional drivers (should be in start menu/programs, something like driver... or additional drivers...). I had a similar problem with resolutions, I think an update (or maybe a different linux) helped. You're welcome. Got to run, good luck! – Xen2050 Dec 15 '14 at 20:23
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I have found the problem, for anyone that's stucked like I was for now, and have the same output for xrandr, here's the solution:

xrandr --newmode $(cvt 1280 1024 60 | grep Mode | sed -e 's/.*"/1280x1024/')
xrandr --addmode DVI-1 1280x1024

After that you can change the resolution by going to display

Marian Ioan
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