Bug 383450

Summary: [Firefox 55] - is trigering too many unnecessary windowChanged eventss
Product: [Frameworks and Libraries] frameworks-kwindowsystem Reporter: Michail Vourlakos <mvourlakos>
Component: generalAssignee: Martin Flöser <mgraesslin>
Status: RESOLVED NOT A BUG    
Severity: normal CC: kdelibs-bugs
Priority: NOR    
Version: 5.36.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:

Description Michail Vourlakos 2017-08-13 10:30:57 UTC 
We are observing from the new Firefox 55 that is sending through kwin too many windowChanged events when the mouse is just hovering over webpages... this wasnt happening with Firefox 54.

is that normal? or firefox broke something?
Comment 1 Martin Flöser 2017-08-13 10:36:48 UTC 
what is a "windowChanged" event?
Comment 3 Martin Flöser 2017-08-13 11:10:54 UTC 
and which properties are changed?
Comment 4 Michail Vourlakos 2017-08-13 12:13:42 UTC 
It is changing, NET::WM2IconPixmap in every mouse hovering
Comment 5 Michail Vourlakos 2017-08-13 12:15:58 UTC 
Oh... and also NET::WM2OpaqueRegion in every mouse hovering in webpage especially in its startup screen
Comment 6 Michail Vourlakos 2017-08-13 12:19:35 UTC 
Ohhhh... this is serious... if you search something with google the results page from firefox creates an endless loop of signals like mentioned here and makes kwin to high cpu usage...
Comment 7 Martin Flöser 2017-08-13 14:25:57 UTC 
These are both properties set by Firefox and not by the window manager. The window manager only listens to changes. Sorry, but from our side there is nothing to do, we cannot do anything about Firefox sending those changes.

Please report to Firefox.
Comment 8 Michail Vourlakos 2017-08-13 17:07:06 UTC 
ok Martin,
reported at: https://bugzilla.mozilla.org/show_bug.cgi?id=1389953