Comment 3 for bug 487473

with these permissions the device should be accessible, does the chroot have a video group and do the GIDs match ?
using 777 is definately adding a huge security hole, you should not do that.
there seems to be a discrepancy between server and client in the group numbers.

(anyway the only proper fix is to have dbus communication between server and client going on, at some point the group stuff wont work anymore since everything is moving to udev-acl)