Key info, this relates to discrete cards only, not integrated graphics:
Since Linux lacks the infrastructure for properly and reliably indicating if a full-screen 3D game is running versus another application, this change will just use the full-screen 3D power profile at boot time by default. It’s better in the name of performance but with more aggressive ramping of the core/memory clock frequencies it can come with an increase to power use by default.
I’ve consistently enjoyed and come back to the following for years:
I also like to boot up and listen to the Amiga title music for SWIV and the Mega Drive/Genesis soundtrack of Revenge of Shinobi.