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I have noticed that everytime I lock desktop resolution of lock screen change to I guess 800 something while my resolution of desktop is 1920x900.

  • Please add more information of your system (such as video driver information) so it helps people better understand the scenario. Have a nice day! – Hasan Dec 7 '19 at 6:50
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Same problem here I've got 2 monitors (Samsung, 2048x1152, primary; LG, 1680x1050). After (re)boot: the resolution on the primary screen is correct. After login: on lock screen, the resolution changes to 1280x1024.

here my xrandr-infos from lock screen:

Screen 0: minimum 1280 x 1024, current 1280 x 1024, maximum 1280 x 1024
default connected 1280x1024+0+0 0mm x 0mm
   1280x1024     77.00* 

After unlock screen the resolution changes back to the correct values. But sometimes my desktop is pixelated.

I already tried to create a script like here: Pantheon-greeter login screen has incorrect resolution on external monitor

But it does'nt work.

Any other ideas?


Update: I've got this issue after install nvidia driver 340.108

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