Arch Linux

Gregosky

Member

From: UK

Registered: 2013-07-26

Posts: 184

Blurred image when picking highest available resolution

Hi all,

I do apologize if this issue was discussed somewhere else on this forum - I could not find any related post so I decided to start this topic.

A few words of introduction - I am using 27'' dell ultra-sharp (U2711) with my old nvidia GeForce GTX 570. Everything works fine when I connect both devices directly (DVI). I used to work on 2560x1440 resolution.

I am using the same screen to connect my business laptop where I run win7 and I do that through HDMI.

I was finding it a bit frustrating to have to switch input source on screen and switch keyboards every time I wanted to do some work on the other machine so I got nice 4 ports StarView KVM.

First I connected laptop - this time I docked it and used DVI lead. Everything worked fine, win7 detected correct screen resolution and picture is nice and sharp.

The problem is that when I connected my Arch box I get blurry picture when running on usual resolution. I have to drop down to 1680x1050 in order to be able to read or use my computer at all.

First I thought there might be some problem with X suddenly not detecting my screen correctly but there is no complaint in xorg log.

Then I thought that maybe DVI leads I use got broken - so I brought new cables and problem is still there.

I also was trying to use second DVI input rather than first one - no joy.

This is how picture looks like when I set 2560x1440 resolution:
flickr - high resolution

And this is how picture looks like when I set 1680x1050 resolution:
flickr - low resolution

Guys, I know this seems to be somewhat non-standard issue but maybe you can point me out to the right direction?