Persistent rendering glitch (black region) covering top of window

[epitron]

Hi there!

I'm experiencing a rendering error using Qupzilla v2.2.5 (and the latest git clone of Falkon) where a flickering black bar is covering the tab/address area of the window. (It looks a bit like the outline of a Chrome tab -- maybe some leftover Chrome code in the QtWebKit library?)

Here's a video for reference: https://0x0.st/sTF4.mp4

I'm running Qupzilla in Openbox on 64-bit Arch Linux on an old Sony Vaio netbook (Intel HD Graphics and an Intel Atom processor).

It has pretty bad X11 support (no xv), which might be a factor.

[ghost]

I would try to disable animated scrolling (it might decrease the black area while scrolling) and check how it run without gpu acceleration.
You can try using --disable-gpu (but it doesn't disable it completely)

[epitron]

It looks the same after disabling animated scrolling and GPU acceleration.

This must be an upstream QtWebEngine problem that's being revealed by my terrible graphics chip. :)

[magiblot]

I believe this is the cause of the problem:
https://bugs.freedesktop.org/show_bug.cgi?id=104439
See my comment #9 in that page.
It's related to the linux kernel updates.