Created attachment 143242 [details]
dmesg with backtrace

Currently https://cgit.freedesktop.org/~agd5f/linux/tree/?h=drm-next-5.1-wip is
totally broken at least for raven 2400g apu.

4.20.5 works pretty well on this machine.

Dmesg with backtrace attached.

Dear AMD developers: it would be bad if drm-next-5.1-wip code in its current
state went into mainline, please review and fix.