Comment # 16 on bug 99801 from mikita.lipski@amd.com

The issue seems to be fixed, please try verifying the following commit:  

'acea3103ed43d4dddca284297229b96b4457013d'
Author: Leo (Sunpeng) Li <sunpeng.li@amd.com>
dm/amdgpu: Do not release DC state on S3 resume

The issue was caused by improper synchronization of the panels of 5K display.
It also seems like issue is more display specific because the issue was
reproducing very inconsistently.