How to change screen extension on lock screen in linux?

Question

linux

I am using Elemetary OS 0.4 based on Ubuntu 16.04.5 LTS.
Because my extension (1280x1024) was not in the settings by default, I installed it via xrandr, however, on the lock screen, when I logged in, the standard HD extension remained, how can I change it to 1280x1024?

Answer 1

Elemetary OS 0.4 is still raw, I would not recommend using it yet.
And as for the question, did you choose the correct drivers for the video card?

Because my extension (1280x1024) was not in the settings by default

may indicate that the drivers are standard, you need to switch to the latest version of your video card (Nvidia or AMD)