[filelight] [Bug 508234] Filelight fails to display usage graph

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=508234

--- Comment #5 from genosimple at gmail.com ---
(In reply to Nikolay Kochulin from comment #4)
> Can confirm under Arch Linux with NVIDIA proprietary drivers.
> However, interestingly, forcing Vulkan via `QSG_RHI_BACKEND=vulkan` makes
> the usage graph show up again.

Can confirm that starting it with "QSG_RHI_BACKEND=vulkan filelight" indeed
fixes the problem.

This seems to be either a flaw of NVidia's opengl implementation, or Qt/KDEs
bug. I noticed that another program written in Qt(86box) freezes when I choose
OpenGL renderer, but works fine with vulkan's backend.

Also Steam and games seem to work just fine under Proton, but maybe they all
use Vulkan and not OpenGl.

Running glxinfo doesn't seem to show any anomalies, and glxgears test program
performs absolutely fine as well. So this seems to be limited to Qt/KDE OpenGL
implementation.

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