[rkward] [Bug 503487] Help pages and rkward welcome page don't render correctly

[Thomas Friedrichsmeier]

https://bugs.kde.org/show_bug.cgi?id=503487

--- Comment #8 from Thomas Friedrichsmeier <thomas.friedrichsmeier at kdemail.net> ---
Ok, thanks. I do not see a smoking gun, however, or at least I do not recognize
one. All working conditions seem to log (given line number differs when using
the system lib):

> gpu_init.cc(1079)] Vulkan disabled or failed to initialize

Unfortunately, I can neither see any details why AppImage disables GPU/Vulkan,
nor do I see anything standing out in the log of the broken condition (except
that it's remarkably short, for some reason?).

One additional thing you may want to check is running chromium on your desktop
machine (qwebengine essentially just warps chromium, though not necessarily in
the same version), and enter "chrome://gpu/" in the navigation bar. I do guess
it will show "Vulkan disabled" among a lot of other info, as I suspect is
needed for correct rendering, there.

Going forward, for RKWard I suppose, I will add an easier way to turn off
webengine GPU support, to make it easier to work around this problem. However,
the actual bug to address is going to be in the QWebEngine package in your
distribution, so you should report the problem, there.

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