Bug 370001

Summary:	Subpixel AA turned off on some UI controls
Product:	[Plasma] plasmashell	Reporter:	EP <bertyfogs+kdebugs>
Component:	general	Assignee:	David Edmundson <kde>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bshah, cfeck, nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.7.5
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	red -- subpixel AA off, green -- on case 2 case 3: taskbar button and tooltip

Description EP 2016-10-04 20:43:11 UTC

I remember there was a bug filed few years ago about inability of the qt engine to apply subpixel aa on transparent backgrounds (e.g. task manager buttons), but can't find it now -- may this is related to that.
Don't know if this is a kde bug or a qt bug, hope you will sort it out.

Reproducible: Always

Steps to Reproduce:
1. Have subpxel AA turned on
2. Open Plasma Desktop Settings for example
3. See how fonts are rendered on the UI controls (such as dropdown menus, buttons)

Actual Results:  
Subpixel AA is turned off on some of the controls

Expected Results:  
Subpixel AA is turned on everywhere

Comment 1 EP 2016-10-04 20:54:32 UTC

Created attachment 101418 [details]
red -- subpixel AA off, green -- on

Comment 2 EP 2016-10-04 20:55:42 UTC

Created attachment 101419 [details]
case 2

Comment 3 EP 2016-10-04 20:56:19 UTC

Created attachment 101420 [details]
case 3: taskbar button and tooltip

Comment 4 Christoph Feck 2016-10-07 02:30:08 UTC

This could be https://bugreports.qt.io/browse/QTBUG-22334 if some Plasma QML components render to an offscreen Pixmap.

Comment 5 Nate Graham 2021-03-10 00:16:30 UTC

This was an issue with PlasmaComponents2 which uses QtQuickControls1, and it has been resolved as of a few years ago.