Bug 322406

Summary:	Activities RMB context menu sometimes causes KWin to freeze for ~1 minute
Product:	[Plasma] kwin	Reporter:	Brendon Higgins <brendon>
Component:	activities	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	4.10.4
Target Milestone:	---
Platform:	Debian unstable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Brendon Higgins 2013-07-15 19:26:48 UTC

See this comment, and the rest of the thread which regards a similar bug (possibly same root cause) that was affecting Dolphin context menus: https://bugs.kde.org/show_bug.cgi?id=314575#c17

I find this to be reproducible at the moment, but if it's like the bug Dolphin was experiencing, it may come and go depending on the time of day/mood of the network/position of the stars/etc. When you get it, it tends to stick around until at least re-logging in, though.


Reproducible: Sometimes

Steps to Reproduce:
Right click on the window title bar, then mouse over "Activities".
Actual Results:  
Congratulations, you now can't use your desktop for about a minute, evidently until something times out.


For what it's worth, I'm in strong agreement with Frank's sentiment expressed in the linked thread: operations that could potentially block the UI have no place in a context menu. Personally, I think that starting with a "Loading..." placeholder (or similar), then updating the menu once the operation is complete, would be the best solution.

Comment 1 Thomas Lübking 2013-07-15 19:34:44 UTC

Actually libkactivities is supposed to cache those values, thus avoid the dbus calls, meanwhile.

*** This bug has been marked as a duplicate of bug 304626 ***

Comment 2 Brendon Higgins 2013-07-15 19:40:58 UTC

Ah. I was assuming that the values in question were of the type that couldn't be sensibly cached, but certainly that would be an even better solution if possible.