I always add a space or two before the flag: / -x

What license is the source code under?

Does this output anything? journalctl -q -t kernel -g "gpu reset begin"

I believe classic refers to the FOSS version before the fork, while “Nexuiz” refers to the commercial version.

Super Tux Kart, The Dark Mod, and X-Moto are great. I created the original Skate Park Mod and a few of the early “interesting replays” like Slinky Mod, German Ham, and the first “cheating” replay.