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List:       kde-bugs-dist
Subject:    [Bug 261323] Flip Switch causes desktop to become unresponsive
From:       Ralph Moenchmeyer <rm () anracon ! de>
Date:       2011-04-24 11:07:55
Message-ID: 20110424110755.6F36086364 () immanuel ! kde ! org
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https://bugs.kde.org/show_bug.cgi?id=261323





--- Comment #68 from Ralph Moenchmeyer <rm anracon de>  2011-04-24 13:07:53 ---
Yes, I used direct rendering and my test referred to the cube. Without direct
rendering there is no problem with the cube, desktop switching and returning to
the chosen desktop. With direct rendering the system "freezes" for a period of
several seconds as described in comments 20, 60 and 66.   

I commented the cube problem here because the corresponding bug was marked as a
duplicate of this one. Sorry, if this led to some confusion.  

By "flip switching" you probably mean the effect by which you flip through a 3D
(diagonal) sequence of active windows to choose one ? 

If yes: 

My desktop freezes during "flip switch" for window selection, too, and in a
very similar (if not identical) way as with the cube animation for desktop
selection. The freeze occurs in both cases when returning to the normal desktop
- not during the animation itself. The desktop gets unresponsive until Kwin
deactivates desktop effects.    

One difference, however, is that with the "flip switch freeze" I see horizontal
artifacts running over the screen. The keyboard remains active for one second
in the chosen window. A mouse click leads to a total "freeze" until the
deactivation of 3D desktop effects by Kwin. I also see a spike in CPU activity
during the freeze at the end of the flip switch animation. 

This is so similar that I think the reason for both the "cube" and the "flip
switch" problem since KDE 4.6.2 probably is one and the same. 

I should add that I do not have any problem with the second flip switch
animation - that one where the 3D windows move horizontally from a stack on the
right side to a stack on the left side. I do not know what that animation is
called in English. This second animation for choosing a window works without
any problems. Maybe this helps to narrow down the line of investigation. 

I should add, too, that I never experienced any of these animation problems
with KDE 4.5.x. From there I went directly to KDE 4.6.2.

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