Comment 7 for bug 863119

I confirm this issue on a fresh installation with daily desktop image (20111003)
I attached the output of "LIBGL_DEBUG=verbose glxinfo"

important bits:
libGL: OpenDriver: trying /usr/lib/i386-linux-gnu/dri/tls/i965_dri.so
libGL: OpenDriver: trying /usr/lib/i386-linux-gnu/dri/i965_dri.so
libGL error: failed to open drm device: Permission denied
libGL: OpenDriver: trying /usr/lib/i386-linux-gnu/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib/i386-linux-gnu/dri/swrast_dri.so

and ck-list-sessions:
Session3:
 unix-user = '1000'
 realname = 'ubuntu'
 seat = 'Seat1'
 session-type = ''
 active = FALSE
 x11-display = ''
 x11-display-device = ''
 display-device = '/dev/tty1'
 remote-host-name = ''
 is-local = TRUE
 on-since = '2011-10-03T08:45:46.135467Z'
 login-session-id = ''
 idle-since-hint = '2011-10-03T09:09:06.602876Z'