Comment # 63 on bug 111481 from Doug Ty

(In reply to Matthias Müller from comment #58)
> Don't know where to report as the navi-firmware is not in the
> kernel-firmware, yet?

Not sure if this is correct, but I've created a separate issue for these
"divide error" hangs over here:  
https://bugs.freedesktop.org/show_bug.cgi?id=111869