Comment 44 for bug 1761751

Problem still exists in 4.16.10 kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16.10/
(#uname -r output is 4.16.10-041610-generic )

dmesg output gives same error output as before when amdgpu.dc=1

 [ 1.866312] [drm] amdgpu: 1024M of VRAM memory ready
 [ 1.866316] [drm] amdgpu: 3072M of GTT memory ready.
 [ 1.866332] [drm] GART: num cpu pages 262144, num gpu pages 262144
 [ 1.866382] [drm] PCIE GART of 1024M enabled (table at 0x000000F400040000).
 [ 1.866500] [drm] Internal thermal controller without fan control
 [ 1.866504] [drm] amdgpu: dpm initialized
 [ 1.867685] [drm] Found UVD firmware Version: 1.55 Family ID: 9
 [ 1.868113] [drm] Found VCE firmware Version: 50.10 Binary ID: 2
 [ 1.870125] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:3! type 0 expected 3
 [ 1.870214] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:4! type 0 expected 3
 [ 1.870337] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:5! type 0 expected 3
 [ 1.870445] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:6! type 0 expected 3
 [ 1.880211] [drm] Display Core initialized with v3.1.27!
 [ 1.887329] [drm] SADs count is: -2, don't need to read it
 [ 1.887755] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
 [ 1.887761] [drm] Driver supports precise vblank timestamp query.
 [ 1.906232] [drm] UVD initialized successfully.