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

--- Comment #18 from Kelly Anderson <kelly@xilka.com> ---
This bug did not affect 4.6.x and earlier, it started with:

commit 70eced9b2e05f38274ebe8ad91c472bb684fa82a

That commit enables new features on the Carrizo,

-               adev->cg_flags = 0;
+               adev->cg_flags = AMD_CG_SUPPORT_GFX_MGCG |
+                       AMD_CG_SUPPORT_GFX_MGLS |
+                       AMD_CG_SUPPORT_GFX_RLC_LS |
+                       AMD_CG_SUPPORT_GFX_CP_LS |
+                       AMD_CG_SUPPORT_GFX_CGTS |
+                       AMD_CG_SUPPORT_GFX_MGLS |
+                       AMD_CG_SUPPORT_GFX_CGTS_LS |
+                       AMD_CG_SUPPORT_GFX_CGCG |
+                       AMD_CG_SUPPORT_GFX_CGLS;

So it should be relatively easy to isolate the problem by stepping through
those features one by one to isolate which of those flags is triggering the
problem.

I'm available to test semi-official patches until the problem is properly
fixed.  In the meantime I've reverted the patch on my 4.7.6 kernel and have run
for over two days without encountering the problem.

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