https://bugs.kde.org/show_bug.cgi?id=433890

Aki <k...@aki.tw> changed:

           What    |Removed                     |Added
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                 CC|                            |k...@aki.tw

--- Comment #6 from Aki <k...@aki.tw> ---
I encountered this problem too when running on nvida+wayland+(non-es) opengl
environment.

The problem happens since this commit.
https://github.com/KDE/kwin/commit/e7cd2c439635865ac316f4c6cb2676e5c575d2db

As a optimization, kwin now read the output texture directly.
There is bug is nvidia driver that you can't read texture using glGetTexImage
when the texture is created from dma buf.

The bug can reproduced with this test program.
https://github.com/yuq/gfx/blob/master/base/opengl-dma-buf/main.c

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