This is a brand new sched_extscheduler that is backed by Valve. Steam Deck hardware has it on by default, and other handheld PCs can enable it via “Custom Scheduler” in HHD under the Energy Management setting.
Desktop users can use this command to run it:
sudo scx_lavd
Leave the terminal running in the background to play with this.
If you want to swap to the :testing branch to test the new scheduler, then read information on rebasing.
This does not seem all that possible on an HTPC setup. Can’t switch back to game mode with terminal running and HHD does not work outside of compatible handhelds yet.