I have Silverblue Rawhide with last developement versions of Gnome Shell and Mutter installed.
I have tried to enable rt-scheduler (https://gitlab.gnome.org/GNOME/mutter/merge_requests/460) by:
$ gsettings set org.gnome.mutter experimental-features “[‘rt-scheduler’]”
$ setcap CAP_SYS_NICE=+ep /usr/bin/gnome-shell
unable to set CAP_SETFCAP effective capability: Operation not permitted
How to do it properly?