Direct Rendering is not working with Xorg 18.104.22.168 from Fedora Rawhide (22.214.171.124-5)
And with 6.7.0-7.2, DRI works good.
lspci tells my Graphic Chip as follows
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
Upgrade to the current snapshot, which is 126.96.36.1992. If the problem persists,
reopen the bug report, and attach your X server config file, log file, and
/var/log/messages as individual uncompressed file attachments using
the bugzilla attachment feature.