How to force change monitor resolution?

Question

linux

Good evening.
Put ubuntu
Monitor 1280x1024 shows "invalid range", that is, the resolution of the picture is higher than this.
Connected to the TV (1366x768) - everything works.
How can I change the display resolution of the picture for my monitor 1280x1024 which one?

Answer 1

man xrandr
man X
Well, that is, you need to edit xorg.conf, most likely. Earlier, in the days of CRT monitors - the answer was immediately - the scanning frequency is higher than what the monitor understands. Now the very concept of "sweep frequency" has been archived, but the Monitor section is still there and can be filled with the necessary parameters.
Here is an example:

Section "Monitor"
    Identifier  "NEC MultiSync LCD2690WUXi"
    VendorName  "NEC"
    ModelName   "MultiSync LCD2690WUXi"
    HorizSync   32 - 92
    VertRefresh 50 - 85
    Option "DPMS"
    Option "PreferredMode" "1920x1200"
    Option "Primary" "true"

Answer 2

connect to the TV, in the display settings, set the resolution to 1024x768 or 800x600 (do not forget to save / apply the settings)
then connect the monitor and set it to 1280x1024
PS
why first 1024x768 or 800x600?
because, it’s not a fact that the TV will not go out when you try to set 1280x1024
or part of the screen will not be visible