video_hard_sync is not used on the rpi
Kind of thought so.
By the way, did one additional test:
gl + vsync = false: 9 frames
Since my plasma seems to have 4 frames input lag (although that’s not confirmed), that would lead to 5 frames latency (or approximately 80 ms) for RetroPie. However, playing without vsync is curiously stuttery on this system.
there’s some tips here: https://www.reddit.com/r/emulation/comments/41okgr/can_someone_help_me_reduce_input_lag_for_retroarch/ (user libretro should know what they’re talking about!)
Yep, I found that as well! Some interesting stuff there.
it’s also worth experimenting with the input drivers. i think it defaults to udev, but linuxraw might be faster? try the others also.
there is also a new input polling option in settings > input called “poll type behavior” that may help when set to “late” vs “early” or “normal”.
it’s a lot of experimentation but i’d love a sort of comprehensive list of what does/doesn’t help would make a good wiki page…
Yep, I’ll have a look at those options as well. I’ll hopefully have time for it this weekend.