https://bugs.kde.org/show_bug.cgi?id=488860
edy.b...@gmail.com changed:
What |Removed |Added
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CC| |edy.b...@gmail.com
--- Comment #10 from edy.b...@gmail.com ---
> Yujiro Hanma 2024-06-21 05:10:48 UTC
> This also spams my journal log, which I think confirms my suspicion that this
> is related to triple buffering.
> ``kwin_scene_opengl: 0x2: GL_INVALID_OPERATION in glDrawBuffers(unsupported
> buffer GL_BACK_LEFT)``
> Vlad Zahorodnii 2024-06-21 07:40:44 UTC
> ... Regarding GL_INVALID_OPERATION, it's a Qt issue.
I believe Vlad is right, I just posted
https://bugreports.qt.io/browse/QTBUG-122819#comment-844572 with a tentative
explanation/patch for the `GL_INVALID_OPERATION` errors caused by
`GL_BACK_LEFT`.
I'm not sure the `glDrawBuffers` call failing even has any effect - if it did,
you would probably see some UI elements never render at all, my best guess is
that the OpenGL default behavior "just works" in this case.
Part of my reasoning it that `glDrawBuffers` used to not be called at all, on
the now-failing path:
https://github.com/qt/qtbase/commit/c9ad5ad3b73ff60e9a40173b1ae49e67800a4b72#diff-23f339fbfdf978a2c6cbdb4b300ed9dce434d55ca6168c558b8ba8e99f87b2b7R3019
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