[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #41 from Andrey Arapov <andrey.arapov at nixaid.com> ---
Not sure if that helps, but could you try reverting this commit?
https://github.com/torvalds/linux/commit/e03fd3f300f6184c1264186a4c815e93bf658abb

My MacBookPro Mid 2017 started to experience the black screen issue since
4.18.0-rc1 up to 4.19.0-rc4 (and probably higher). Having that commit reverted
has resolved the black screen issue I had, allowing me to use amdgpu.dc=1
again. 


Refs:

- https://github.com/Dunedan/mbp-2016-linux/issues/73#issuecomment-422397681

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