I have been playing ps2 on a laptop for about a year now. I recently built my new computer and uninstalled ps2 on the laptop. Due to unforseen circumstances, I have to continue using the laptop for another month. I reinstalled ps2 on it, but extreme input lag for the keyboard and mouse make it unplayable. I didn't have this problem before, and I'm wondering what could have caused it. I can't find a solution on the forums to other peoples threads with the same problem, so please respond if know a solution.
Click CTRL+F, it should showing xxFPS(GPU) like that, try limit the FPS or reduce the GPU load will prevent this happen.
Yes, if you don't enable v-sync. There are such a long time that some player facing large input lag when it is GPU bound, but not when CPU bound or FPS limit, including me.