I didn't apply all your tweaks yet but just by adding "VBLANK_MODE=0" and "R600_DEBUG=..." I can definitely feel the difference and my scores are way better now. Actually, it kinda felt like the music was a little bit offsync with notes but I easily corrected that by configuring a delay in game settings. Disabling the KDE compositor didn't do much of a difference but I implemented it in the .sh file I use to start the game with.Espionage724 wrote:
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Also I already removed fglrx, installed mesa from the repository and the kernel. The difference was also noticable. Thanks again!
EDIT: I just beat one of my personal records right now on Kubuntu. I definitely consider this entire "operation" a huge success. This guide (and your help) turned this game from "quite unplayable" (I had huge input delays in both mouse and keyboard, even though my mouse accel was already off) to "probably more playable than on Windows".