Here's what I had to do to make the "permissions too restrictive" error go
away,(nVIDIA glx error)on Mandrake 9.
I tried commenting out the <dri> line in /etc/security/console.perms and then
doing the chmod 0666 /dev/nvidia* chown root /dev/nvidia*.
When I rebooted I got a serious error, and could not get into X or anything
except console.
Then I had to restore the /console.perms file,with the backup I made, rebooted, and everything works
fine now.
For some reason, it seems you DON'T have to edit the /console.perms file at all,
just do the chmod 0666 /dev/nvidia* chown root /dev/nvidia*.
Maybe one of you senior guys (I mean senior in EXPERIENCE with this sort of
thing) can explain why this is, unless it only works for me, in which case I am
totally without a clue. Come to think about it, I don't have any clue anyway!