Hello again, after further investigation, it wasn't gnome-screensaver resetting my nvidia settings but totem.
Found this bug and can reproduce it manually : https://bugs.launchpad.net/ubuntu/+source/totem/+bug/512493 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-settings in Ubuntu. https://bugs.launchpad.net/bugs/33214 Title: gnome-screensaver restores default color-correction settings _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp