[Bug 95306] Random Blank(black) screens on "Carrizo"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95306

--- Comment #37 from cyrwyn <cyrwyn at gmail.com> ---
I also have an HP g121wm laptop with an A10 8700p apu/gpu chipset (carrizo R6).
Ever since the removal of the catalyst driver and replacement with the Xorg
amdgpu driver at least 6 months ago, shortly after the kernel loads and detects
hardware the screen blanks, the keyboard doesn't respond, although numlock and
capslock are working, but any of the alt+ctl or reisub commands won't work,
however the system does continue to load in the background. I suppose this
occurs when kernel mode setting kicks in. I can only get a working screen using
nomodeset in the command line, which limits me to an 800x600 fb screen. AMD
support tells me there is no support for R6 graphics in amdgpu pro, but an Xorg
support person tells me that their Xorg version of amdgpu (not pro) does
support this carrizo chipset. I've tried the latest Xorg amdgpu to no avail.
Apparently, the basic Xorg.ati driver won't work with this chipset. I even get
conflicting accounts of how to set up this card with the vesa driver! I haven't
been able to achieve it and I'm a 24 year Linux user! I've tried this with all
kernels since 4.3 and am now running 4.8.11 and the problem remains. BTW I run
PClinuxos with KDE. 

Is this even a bug or just an unusual configuration issue? 

I don't have the amdgpu driver installed at the moment, but here are my dmesg
and Xorg.log files.

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