https://bugs.freedesktop.org/show_bug.cgi?id=102389

            Bug ID: 102389
           Summary: Random black screen on RX 470, HDMI 4k-60Hz
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: jeremi.jasinski@gmail.com

I am using amd-staging on arch linux -
https://aur.archlinux.org/packages/linux-amd-staging-git/ and AMD RX 470.

I have 4k monitor (AOC U2879VF), which display port connector has broken, so
i'm forced to use HDMI. On dp there were no problem, unfortunately while using
HDMI 4k 60Hz I get random black screen, lasting for 1-2 seconds, while using my
computer (watching movie, playing games, or browsing internet). 

The black screens happens since at least 4.11 amd-staging-git version.

I attached dmesg log, and xorg log. If you need something else please tell me.

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