The first time I am logged in to the system after startup, I do not have
permission to open DRM:
What I did was:
1. Turn on computer.
2. Log in as root.
3. star KDM: /etc/init.d/xdm start
4. Log in as normal user.
5. Open Konsole.
6. Run glxgears. Now I get:
libGL error: open DRM failed (Operation not permitted)
7. Log out.
8. Log in (session restored).
9. Run glxgears. It runs with 3D-acceleration.
My xorg.conf contains:
Section "dri" # from http://dri.freedesktop.org/wiki/Building
Group "dri" # from http://dri.freedesktop.org/wiki/Building
Mode 0660 # from http://dri.freedesktop.org/wiki/Building
EndSection # from http://dri.freedesktop.org/wiki/Building
This is reproductible. I tried several power cycles.
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