original bug at openSUSE bugzilla
Web contents rendered with QtWebEngine and the amdgpu driver have heavy glitches since a recent update. Some examples:
- Scrollbars have glitches until a mouse over happens
- embedded videos have glitches until mouseover
- YouTube videos will lag heavily when the playback controls are displayed
The problem appears in programs that use QtWebEngine (libqt5-qtwebengine) like KMail and Falkon.
It does not appear in Firefox which uses its own rendering engine.
It does also not appear on another machine that has an Intel iGPU when using programs that use QtWebEngine.
Therefore I believe the problem is related to the amdgpu kernel driver and it manifests only when using QtWebEngine, so I filed it as a kernel bug.
I'll attach some example screenshots to illustrate the issue.
Operating System: openSUSE Tumbleweed 20190621
KDE Plasma Version: 5.16.0
KDE Frameworks Version: 5.58.0
Qt Version: 5.12.3
Kernel Version: 5.1.7-1-default
OS Type: 64-bit
Processors: 12 × AMD Ryzen 5 2600X Six-Core Processor
Memory: 31,4 GiB
Created attachment 144621 [details]
embedded video 1 - glitched
Created attachment 144622 [details]
embedded video 1 - correct
Created attachment 144623 [details]
embedded video 2 - glitched
Created attachment 144624 [details]
embedded video 2 - correct
Created attachment 144625 [details]
KMail scroll bar - glitched
Did Mesa get updated as well? That would be a more likely candidate than the kernel.
Yes, Mesa was upgraded to 19.0.5 in the snapshot from June 3rd:
It's perhaps the same bug as reported here:
The artifacts look very similar to my screenshots.
Let's assume it is. It's fixed in 19.0.6.
*** This bug has been marked as a duplicate of bug 110721 ***