Ubuntu cinnamon display settings doesn't run

I'm working on Ubuntu 20.04 with Cinnamon 4.4.8 desktop. Some time ago I started to have issues with my displays: they either aren't detected or the layout is reset to default one. I tried to access display manager from settings from terminal. This is the output after selecting display manager:

cinnamon-settings
True
Using pam module (python3-pampy)
Loading Display module
**
CinnamonDesktop:ERROR:../libcinnamon-desktop/gnome-rr-config.c:666:gnome_rr_config_load_current: assertion failed: (gnome_rr_config_match (config, config))
Bail out! CinnamonDesktop:ERROR:../libcinnamon-desktop/gnome-rr-config.c:666:gnome_rr_config_load_current: assertion failed: (gnome_rr_config_match (config, config))
Aborted (core dumped)

Any hints how to fix it?

1 Answer

I needed to reinstall desktop environment.sudo apt-get install --reinstall cinnamon