272053 2011-04-30 13:44:17 +0000 KWin hangs on [Alt-Tab] when FlipSwitch is selected as [Alt-Tab] effect. 2011-04-30 14:49:12 +0000 1 1 4 Plasma kwin effects-window-management unspecified Ubuntu Linux RESOLVED DUPLICATE 261323 NOR crash --- 0 barafu kwin-bugs-null 0 oldest_to_newest 1113082 0 barafu 2011-04-30 13:44:17 +0000 Version: unspecified (using KDE 4.6.2) OS: Linux When "Effect for windows switching" is set to be FlipSwitch, there is about a 1/3 chance that all KWin hangs up, blocking input. (The only way go is Ctrl-Alt-F1). Even if it didn't, there is the same chance to hang up when using Alt-Tab, pressing it briefly. However, no bugs occur when Alt-Tab is pressed and hoild to see the FlipSwitch animation. Reproducible: Always Steps to Reproduce: 1) Go System Settings -> Desktop Effects. Set "Effect for window switching" to FlipSwitch. 2)Open a few windows. Press and hold Alt-Tab. Everything works. 3)Press Alt-Tab momentarily several times. Everything hangs. Actual Results: No way to recover found. Key combo that stops desktop effects don't work. Restart your X server. Expected Results: It seems that when Alt-Tab is pressed for a moment, the animation does not start, does it? Windows should just switch. That didn't happen in previous versions of KDE on that machine. I have the latest nvidia prop drivers (270.41.06) 1113087 1 thomas.luebking 2011-04-30 14:26:23 +0000 probably bug #261323 - please try to disable the window title display to confirm 1113089 2 barafu 2011-04-30 14:42:54 +0000 Yes, it helps. 1113091 3 thomas.luebking 2011-04-30 14:49:12 +0000 *** This bug has been marked as a duplicate of bug 261323 ***