Bug 182817

Summary: Blur plugin breaks the Zoom plugin
Product: [Plasma] kwin Reporter: William Hilton <wmhilton>
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UNMAINTAINED    
Severity: normal CC: kde, pzcdyhbb0nzq9layi4mcj1hhp
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Backtrace of KWin Zoom + Blur Crash

Description William Hilton 2009-02-02 03:58:51 UTC 
Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Ubuntu Packages

Enabling the Blur plugin seems to break the Zoom plugin. If both are enabled and I hit Ctrl+= to zoom in, the screen freezes. (The mouse moves, but everything else is like a static picture.) Hitting Ctrl+- or Ctrl+0 to return to 100% zoom brings the screen back to normal. If I don't enable the Blur plugin, the Zoom plugin works properly.

(On intuition, I just tested the Magnifier plugin and it has the same issue. When the Blur plugin is enabled, the Magnifier won't magnify.)

Using Kubuntu 4.2.00 packages, nvidia-glx-180 (180.11-0ubuntu1~intrepid1) driver, xorg (1:7.4~5ubuntu3)
Comment 1 Martin Flöser 2009-04-13 10:52:03 UTC 
*** Bug 189428 has been marked as a duplicate of this bug. ***
Comment 2 Dylon 2009-05-18 15:36:49 UTC 
Created attachment 33802 [details]
Backtrace of KWin Zoom + Blur Crash
Comment 3 Dylon 2009-05-18 15:38:30 UTC 
Comment on attachment 33802 [details]
Backtrace of KWin Zoom + Blur Crash

I successfully managed to crash KWin on KDE Trunk after enabling both the Zoom and Blur plugins ... and here is the backtrace; I can confirm this bug exists in both KDE 4.2.3 and Trunk.
Comment 4 Martin Flöser 2009-05-18 16:41:24 UTC 
@Dylon: your crash is completely unrelated to the problem described in this bug report. As you can clearly see the problem of the reporter is a black screen and *not* a crash. That's a big difference. Please open a new bug report for the crash. And btw. the crash happens in a code path which does not exist in 4.2.
Comment 5 Klaus S. Madsen 2009-06-12 21:41:07 UTC 
Just to make it clear, in case it matters: The problem does not result in a black screen, but in a 1-step zoomed screen. However the screen does not zoom further in, nor does it pan when the mouse is moved around.
Comment 6 Martin Flöser 2010-03-31 18:21:43 UTC 
As there will be a new blur effect in KDE SC 4.5 it does not make sense to keep this report open. If the new blur effect should show the same issue, it is a new bug unrelated to this one.