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 Desktop Bugs, which is a direct subscriber. https://bugs.launchpad.net/bugs/33214 Title: gnome-screensaver restores default color-correction settings -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
