Did you configure the controller via Emulation Station correctly? Maybe do it again to be sure.
There's a script to assign controllers to players. It works very well for me. Maybe it's worth a try for you.
Yeah there are, i don't have a full list but i can mention some :
sega system 24 (you found this one) and probably any other arcade systems using several m68k
sega system 18 and megadrive (m68k worked differently on those systems, so you need another version of cyclone which apparently wouldn't work with "normal" 68k games)
some neogeo games in mvs/unibios, they seem to work with aes though
@Lolonois The PR has some users adding their metrics for the PS feature. Since then there have been more Pis released and every Pi that's more powerful than the previous one will use less cpu % while ideling.
The main concept of is is that is allows switching from a vsynced rendering to an event driven rendering. It makes no sense to keep rendering the same screen if no changes are present. Thus saving cpu cycles and increasing the battery life. on PiZero there are significant savings (40-60% based on theme). I implemented this feature cos my handheld build was overheating while doing nothing but ES. Animations are not a priority on a battery life focused build and Instant PS mode almost doubled my standby time. ie time spend browsing games on ES.
Thanks for providing the log file. I don't notice anything different between the 2 runs, so it's not something related to a configuration.
Try removing pulseaudio completely then reboot the system, this might get rid of any PA interference.