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gnome-session-check-accelerated: GL Helper exited with code 512 / libEGL warning: DRI2: failed to authenticate

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I see the following errors (warnings) in syslogs.

gnome-session: gnome-session-check-accelerated: GL Helper exited with code 512
gnome-session: libEGL warning: DRI2: failed to authenticate
gnome-session: gnome-session-check-accelerated: GLES Helper exited with code 512

gnome-session-check-accelerated-gl-helper --print-renderer returns llvmpipe (LLVM 11.0.1, 128 bits)%. Please note I changed the permissions by mistake lately using the command chown -R root:root /usr. I also reinstalled libegl-dev with the same result. Any idea?

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