radeon and libgl errors

[Sid]

Hi,
When I start X with one of the libGL packages installed, I get an error message in ~/.xsession-errors
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: image driver extension not found
libGL error: failed to load driver: radeon
libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: r600

It may be one of these packages: dbus-glib-0.104, glib-2.46.2_4, libglapi-13.0.4, or libglesv2-13.0.4_1

Everything else works fine, except for some programs that require libGL. I omitted the VESA setting in xorg-drivers, and only have ATI and SCFB set for video drivers. It's not urgent, but I'm letting you know. Do you need to see part of my /var/log/xorg.0.log file?

Thank you