[Bug 111244] amdgpu kernel 5.2 blank display after resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111244

--- Comment #21 from cspack at verizon.net ---
The default is -1 according to the docs and /sys/module/amdgpu/parameters/dc. I
assume it should effectively be the same but it seems to result in different
behavior vs. setting it to 1. DC is enabled in both cases (the log shows
"Display Core initialized"), but setting it to default results in a
suspend/resume failure 100% of the time. Whereas setting it to 1 results in
success most of time, although it did fail eventually after several reboots.
Very strange.

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