Bug 489195

Summary:	Konqueror WebGL redraw bug
Product:	[Applications] konqueror	Reporter:	Dieter Nützel <Dieter>
Component:	webenginepart	Assignee:	Konqueror Bugs <konqueror-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	stefano.crocco
Priority:	NOR
Version First Reported In:	24.05.1
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
See Also:	https://bugreports.qt.io/browse/QTBUG-126701
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Dieter Nützel 2024-06-25 18:18:31 UTC

SUMMARY
Konqueror show with 2 of the 'WebGL examples' redraw errors.
https://www.ibiblio.org/e-notes/webgl/webgl.htm

https://www.ibiblio.org/e-notes/Cryst/NaCl.html
https://www.ibiblio.org/e-notes/webgl/lorenz_model.html

Regression since late 5.2x.xx


STEPS TO REPRODUCE
1. Open NaCl.html 
2. Rotate with mouse

OBSERVED RESULT
1. Missing spheres
2. F5 fix it for the start squence

EXPECTED RESULT
Rotating crystal


STEPS TO REPRODUCE
1. Open lorenz_model.html

OBSERVED RESULT
1. Lorenz model 'blink' only, than missing
2. F5 bring it back with each press

EXPECTED RESULT
Rendered Lorenz model


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.1.0
(available in About System)
KDE Plasma Version: 6.1.0
KDE Frameworks Version:  6.3.0
Qt Version: 6.71

ADDITIONAL INFORMATION
Operating System: openSUSE Tumbleweed
KDE Plasma Version: (empty - should be 6.1.0)
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1
Kernel Version: 6.9.6-2.g2f57ff2-default
OS-Type: 64
Processor: 8 × Intel® Xeon® CPU X3470 @ 2.93GHz
Memory: 23,5 GiB

Comment 1 Stefano Crocco 2024-06-26 17:04:46 UTC

Unfortunately, this is not a bug in Konqueror itself, but by QtWebEngine, the web engine used by Konqueror and provided by Qt. Other browsers using QtWebEngine, such as Falkon, QuteBrowser and the example browser included in QtWebEngine itself.

I created a bug report for this issue in the Qt bugtracker (https://bugreports.qt.io/browse/QTBUG-126701) and I'll close this one as an upstream issue.