How to restore the screen?

Question

linux

I installed the zte mf823 modem on Widnows and deleted it with a pat, and after rebooting the screen went astray and became not clear to the eyes. The most interesting thing is that in Ubuntu the same problem has become. Tell. How to fix it?

Answer 1

Have you tried resetting your monitor using the monitor itself?

Answer 2

Most likely, the cable is not fully wired, so the computer cannot get the EDID. You can run a monitor calibrator, but it's better, of course, to change the cable.