https://bugs.freedesktop.org/show_bug.cgi?id=97166
--- Comment #4 from smoki smoki00790@gmail.com ---
At least AMD listing 00, F0, F1 revs... so pci-ids project might try to differinate descriptions somehow by revs too:
http://developer.amd.com/resources/ati-catalyst-pc-vendor-id-1002-li/
For the bug, i suspect it is one of those "as soon as threading is pushed lockup happens" ;)