Tonight I re-check and see that it's still freezed when I log-out, but the screen isn't gray, it shows the log-in screen with User and password box, but - again - no mouse, no keyboard, no responsible except the long-pressed power button! Only logging out! Restarting or shutting down is normal.
I think that has to do with the fact that rehabman's voodoops2controller.kext is not being saved in kext cache. I'm assuming you have it installed in S/L/E and not in an Extra folder. If so, use Kext Utility to repair permissions and build a kext cache. Copy the .mkext file to caches/com.apple.kext.caches/startup and restart. Then try to log off and see if you still have access to the ps2 devices. Also, please confirm that you are using the most recent version of rehabman's kext. You can get it here: