201777 2009-07-28 15:39:27 +0000 Lock Screen security hole with compositing enabled 2009-07-29 16:50:13 +0000 1 1 4 Plasma kwin general unspecified Compiled Sources Linux RESOLVED DUPLICATE 177495 NOR normal --- 0 summel kwin-bugs-null aseigo 0 oldest_to_newest 800047 0 summel 2009-07-28 15:39:27 +0000 Version: (using Devel) OS: Linux Installed from: Compiled sources With compositing enabled, after locking the screen (and no screensaver is configured) and somebody moves the mouse there is a short time where the actual desktop is displayed after the screen gets dark again and asks for a password. If somebody would set up a camera and then move the mouse he could grab a screenshot... 800050 1 summel 2009-07-28 15:43:40 +0000 Configuring/selecting a screensaver actually does not solve the problem... 800390 2 mgraesslin 2009-07-29 09:00:47 +0000 could you please try if this is related to bug #177495? 800551 3 thomas.luebking 2009-07-29 14:55:04 +0000 just tested w/ and w/o UnredirectFullscreen=false - so yes, it is. *** This bug has been marked as a duplicate of bug 177495 *** 800578 4 summel 2009-07-29 15:47:14 +0000 BUt i don't get flickering fullscreen applications on any of the 2 tested machines..... 800608 5 thomas.luebking 2009-07-29 16:50:13 +0000 the flicker oly occurs when you open another window (dialog/popup) and thus the fullscreen window gets re-redirected (and re-undirected after the other window closed) edit "~/.kde/share/config/kwinrc" (it might be ~/.kde4/... on your distro) find the section [Compositing] add a key UnredirectFullscreen=false reconfigure kwin (konsole) qdbus org.kde.kwin /KWin reconfigure test whether the screenlocker issue persists