xrandr can't set up right screen resolution for screen 1 (ubuntu) -

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summary:

a computer running ubuntu have geforce video card 2 monitors. need set screen resolution second monitor, xrandr doesn't allow it. computer detects 2 screens (0 , 1) instead of 1 screen double sized desktop. how set screen resolution screen 1? (i don't want use extended desktop).

scenario:

it computer running ubuntu 14.04 lts geforce gtx 750 1gb zotac video card, 2 dvi outputs. using xrandr set resolution of second screen. xrandr tells me there 2 connected screens, screen 0 , 1. both connected dvi vga adapter.

problem:

the main screen (screen 0) detects correct configuration immediately. secondary screen (screen 1) fixed @ 800x600 or @ best, 1024x768, should @ 1360x768.

i have tried turning screen off , on , indicating resolution immediately:

xrandr --screen 1 --output dvi-d-0 --off xrandr --screen 1 --output dvi-d-0 --auto -s 1360x768

but command ignores setting of definition. or, error: badvalue (integer parameter out of range operation) major opcode failed request: 140 (randr) minor opcode failed request: 7 (rrsetscreensize) value in failed request: 0x0 serial number of failed request: 23 current serial number in output stream: 25

question:

how set right screen resolution (1360x768) screen 1?

restriction:

i want preserve configuration of screen 0 , 1. many q&a on website talk extending desktop on screen 0 (with virtual display or similar procedures, working 1 screen double size), need preserve screen 0 , 1 because using specific software.

for clarification, if preserve configuration following:

display=0.1 xterm &

and xterm shown on screen 1. if use extended desktop, not work.

any advice welcome.





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