Bug 365780

Summary: Blur effect doesn't work with semi-transparent windows
Product: [Plasma] kwin Reporter: G360 <kde-bugs.9ek5t>
Component: effects-variousAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal    
Priority: NOR    
Version: 5.7.1   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:

Description G360 2016-07-17 15:58:27 UTC 
The Blur effect description says: "Blurs the background of semi-transparent windows". 
But it seems to only work for the Plasma widget Application Dashwoard, and does not work with other windows like Konsole of Firefox, or tooltip pop-ups.

Reproducible: Always

Steps to Reproduce:
1a. Move a window with Alt key and mouse click.
or
1b. Move the mouse over some widget with a tooltip so that a pop-up appears.

Actual Results:  
1a. The window becomes transparent and has not blur effect.

1b. The pop-up is transparent without blur.

Expected Results:  
A transparent and blurred window.

The blur effect is active with the default settings.
Comment 1 Thomas Lübking 2016-07-17 16:00:55 UTC 
The effect requires a hint on the region to blur.
Dupe'd to konsole bug, you'll have to file a bug against FF since it's not maintained here.

https://bugs.kde.org/show_bug.cgi?id=198175#c46 shows how to set a hint (from outside) for the entire window.

*** This bug has been marked as a duplicate of bug 198175 ***
Comment 2 G360 2016-07-17 16:10:47 UTC 
Oh, so it is not forced by the compositor. The actual effect description seems to state that it is. 
Shouldn't the description be updated to reflect that? 

And what about a similar effect which does force blur all transparent regions? Or how could that be archived, a kwin rule?