Hi! Sorry for my English. There is a rule for the program (call it weird_prog) which does not work with compositig ~/.kde4/share/config/kwinrulesrc [1] Description=off compositing blockcompositing=true blockcompositingrule=2 types=4294967295 wmclass=weird_prog wmclasscomplete=false wmclassmatch=1 after weird_prog closed kwin turns on compositing unconditionally even if disabled ~/.kde4/share/config/kwinrc [Compositing] Enabled=false Reproducible: Always
*** This bug has been marked as a duplicate of bug 308438 ***