https://bugs.freedesktop.org/show_bug.cgi?id=75992
--- Comment #59 from nicolas.laplante@gmail.com --- Well, same thing with _mc2.bin, except this line (size changed):
radeon/BONAIRE_mc2.bin: 31792 bytes
I still get the Direct firmware load error and calibrating clocksource TSC takes a long time too. Usually I get this slowdown when the drm firmware cannot be loaded correctly.