(In reply to Thomas DEBESSE from comment #6)
> Hi, also get a graphical hang with "[drm:radeon_pm_resume [radeon]] *ERROR*
> radeon: dpm resume failed" but without having to suspend or hibernate, to
> got this bug I just have to boot my system and wait less than 10min before
> it hangs.

You have very different hardware.  It's not likely these two are related. 
Please file your own bug.