I never experienced noticeable input lag until yesterday.
PSX “Kiss Pinball” is unplayable.
I’m at the start of running a new RetroPie v3.5 with a new Class 10 card, normal Pi2 overclock, 256MB GPU split. I know about LCD Game mode, all TV options off.
The high-speed HDMI is something I can try. And maybe a different PS1 emulator?
Devil’s Crush pinball on PCE is playable, even through Framemeister XRGB-Mini… so I’m interested in this thread and other users experiences.