Created attachment 120318 [details]
An xwd showing corrupted desktop.

Tried the latest powerplay today and I get a shredded desktop (fluxbox) as soon
as I startx.

Apart from the X corruption everything else seems OK, fbcon is OK.

Seems to be -

commit 3e199b1535a70d6169fd11ee309f8bc4c8ba5bb9
Author: Tom St Denis <tom.stdenis@amd.com>
Date:   Tue Dec 1 11:47:21 2015 -0500

    amdgpu/gfxv8: Cleanup of gfx_v8_0_tiling_mode_table_init()

    Simplification and LOC reduction of function
gfx_v8_0_tiling_mode_table_init()