I am running Linux Ubuntu and
I changed my screen resolution 1 time from 1280x1024 to 1024x768 to troubleshoot a web page issue. Anyway, when I went to set it back to 1280x1024, the option was no longer available. I did this through system - preferences - screen resolution .. When I rebooted the computer, it came up with a display of 800 x 600 and only had resolutions lower than that available to change to.
Then I decided to activate the nvidia accelerated graphics version 177 .. That worked fine for a couple days at 2180x1024 until I rebooted. It came up at 1024x768 without the option to change to 1280x1024 ... So I rebooted again and it went to do 320 resolution with only 1 option available and it was lower than 320!! ...
I had to downgrade the driver and upgrade back to 177 to get the screen resolution to 1024x768 ... The 1280x1024 is still not available .. I have 1152 x 864 and 1320x768 but not the one I want 1280x1024