My apologies as it seems I didn't fully understand the proposed workaround. I'll test this out.
On July 30, 2017 2:12:23 PM PDT, bugzilla-daemon@freedesktop.org wrote:

> Comment # 7 on bug 101377 from r380bug@safetymail.info

>     Either you have a different problem than me (unlikely, as we have the exact
>     same symptoms), or you misunderstood my workaround. Or my workaround somehow
>     doesn't work for you. However, since you talk about actually upgrading the
>     firmware to a newer version, I'm guessing you didn't understand the workaround.

>     For my workaround, I neither upgraded nor downgraded any firmware version.
>     However, Linux 4.8 and Linux 4.9 try to load different files for the same
>     graphics card. Linux 4.8 loads tonga_smc.bin where as Linux 4.9 loads
>     tonga_k_smc.bin. Linux 4.8 fully works for me, including 3D acceleration, Linux
>     4.9 runs into the symptoms you described (black screen, fans running full
>     speed).

>     Now, if I replace tonga_k_smc.bin with tonga_smc.bin, then Linux 4.9 _also_
>     fully works for me, including 3D acceleration. That's without upgrading or
>     downgrading any firmware files. All I did was this:

>     cp /lib/firmware/amdgpu/tonga_smc.bin /lib/firmware/amdgpu/tonga_k_smc.bin

>     Here's the md5sum of all my Tonga firmware files:
>     fa6590cc9c9c1b2e7c92874fe98460fa  tonga_ce.bin
>     16bb427918581c29c2e910b5757a1b5b  tonga_k_smc.bin
>     73befe8abbaa7589d4e701ff77291e62  tonga_k_smc.bin.orig
>     8ab907852fc93520ad5f0e06dc23298e  tonga_mc.bin
>     a0fcc61ba211ab74829219a4e2282654  tonga_me.bin
>     f904f1835656036fd83b0440ddc28528  tonga_mec2.bin
>     f904f1835656036fd83b0440ddc28528  tonga_mec.bin
>     89b0391b91ff7159a7b0670c8aace566  tonga_pfp.bin
>     55f0a189959a11f07d4064a9f96adfb4  tonga_rlc.bin
>     a61b84ca64068fa6842887a1519ecd4b  tonga_sdma1.bin
>     8324b832498cb27c0919647df17968b4  tonga_sdma.bin
>     16bb427918581c29c2e910b5757a1b5b  tonga_smc.bin
>     fe37ee3d6138cd852215b318cbe65d0a  tonga_uvd.bin
>     1a81cffe8a10460b8ca9eaad537e7286  tonga_vce.bin

>     Note that tonga_k_smc.bin and tonga_smc.bin have the same md5sum on my system,
>     because I copied tonga_smc.bin to tonga_k_smc.bin to make Linux 4.9 work.

> You are receiving this mail because:
> - You reported the bug.

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