I am sort of new to Ubuntu and have an nVidia GTS 250 video card and two monitors: a Samsung and a Dell. In the display setting I have the Samsung show as Samsung monitor and the Dell as unknown. The monitors are the same size, I can without any problem set the Samsung to 1280x1024 but I seem to be stuck on the Dell monitor. I've tried xrandr to no avail.

These are the drivers that I have installed (I opened software center click on edit-> software sources and Additional Drivers tab):

Additional Drivers tab

It seems to me that no matter what I do, I cannot set the right resolution for the Dell, while the Samsung monitor works without a problem.

My Samsung monitor is plugged into DVI via an adapter, where is Dell goes straight into VGA port.

After one of the community users here suggested to switch to proprietary, tested driver I've finally got the right resolution, but now everything is blurred. here is an example: blurred display

when I hover over blurred area it becomes sharp and readable.

Any help is much appreciated.

  • Oh shoot, sorry wrong post. Hope you get an answer soon! – Owen Hines Oct 12 '16 at 16:24
  • Welcome to Ask Ubuntu! ;-) Could you specify which is the one using an adaptor and which goes straight to VGA? (now it says both Samsung) Please edit your question and correct. – Fabby Oct 12 '16 at 16:29
  • Please try switching to the "proprietary tested" driver. – Android Dev Oct 12 '16 at 16:38
  • Fabby, thanks for the sharp eye. the is the Dell that is plugged into VGA and that I cannot set resolution on. – ivan marchenko Oct 12 '16 at 17:00
  • Android Dev, I switched and it sort of works, but now I everything is blurred until i hover over it. – ivan marchenko Oct 12 '16 at 17:10

So I was able to find a fix for this issue. I opened xorg.conf file. Found my monitor with "unknown vendor" and set VertRefresh and HorizSync to the right parameters. After reboot I was able to choose the right resolution for my monitors in display settings.

The setting for 1280x1024 are: HorizSync 31 - 81 VertRefresh 56-75

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