nvidia-settings | Ubuntu 24.04 Noble

*** Problems (for example)

Unable to open X config file '/etc/X11/xorg.conf' for writing.

Error executing /usr/share/screen-resolution-extra/nvidia-polkit: Permission denied

*** Fixit

sudo chmod u+x /usr/share/screen-resolution-extra/nvidia-polkit

*** Problems with config files (is empty)

First step is reinstall Screen Resolution Extra Package | [screen-resolution-extra_0.18.3.tar.gz]
https://packages.ubuntu.com/noble/screen-resolution-extra

sudo apt-get install --reinstall screen-resolution-extra

and second steps is...

*** Backups

sudo cp /usr/share/screen-resolution-extra/nvidia-polkit /usr/share/screen-resolution-extra/nvidia-polkit.ORIG

sudo cp /usr/share/polkit-1/actions/com.ubuntu.screen-resolution-extra.policy /usr/share/polkit-1/actions/com.ubuntu.screen-resolution-extra.policy.ORIG

*** Download and copy the files

wget -O nvidia-polkit https://pastebin.com/raw/M80a5MU1 ; sudo cp nvidia-polkit /usr/share/screen-resolution-extra/nvidia-polkit

wget -O com.ubuntu.screen-resolution-extra.policy https://pastebin.com/raw/f6Kk6qZ3 ; sudo cp com.ubuntu.screen-resolution-extra.policy /usr/share/polkit-1/actions/com.ubuntu.screen-resolution-extra.policy

*** PolicyKit | restart service (or restart the Linux)

sudo systemctl restart polkit

*** Nvidia Setting | start /  use

pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY nvidia-settings