I just got a new ubuntu 14.04 PC at work (I am already using another Windows 7 PC) and found that it had a low resolution (1024x768) set by default, while the ideal resolution for my monitor is 1280x1024 (that is what my Windows PC shows). I learnt about 'xrandr' and decided to add a new mode as directed here.
Now, the real issue is that the resolution has changed to 1280x1024 but there is an apparent shift in the screen position - horizontally towards right about an offset of 1.25 inches and vertically towards up about an offset of 0.125 inches - in ubuntu alone. My Windows PC is just fine. Tried out --auto and --pos options of xrandr but to no avail. I have a feeling I'm missing some feature of xrandr here.
How can I get it back to normal at (0,0) by shifting the position a bit down vertically and a bit left horizontally. Now my screen is positioned at an approximate (100,15)?
Updates :
I tried reverting back to earlier resolution of 1024x768. Then, the screen is back to normal. I mean it is now positioned at (0,0).
I tried deleting the created new mode using xrandr and creating a fresh new mode. Still it has got the shift to the same degree as before.