Comment # 12
on bug 105911
from tnmailinglists@gmail.com
I appear to have a similar issue, like comment #11, where the DVI-I port on my 380X seems to be detected as DVI-D when DC is on and I don't get display over my DVI-I to VGA adapter (it works fine with amdgpu.dc=0). I'm also on Ubuntu 18.04 and I also still experience this with the latest mainline kernel. The Xorg log (extracts below) does still list the EDID for my display, identifies it as analog, and lists the new DVI-D port as connected when DC is on, but the display doesn't turn on. DC on: [ 7.312] (II) AMDGPU(0): EDID for output DisplayPort-1 [ 7.312] (II) AMDGPU(0): EDID for output HDMI-A-1 [ 7.313] (II) AMDGPU(0): EDID for output DVI-D-2 [ 7.313] (II) AMDGPU(0): EDID for output DVI-D-3 [ 7.313] (II) AMDGPU(0): Manufacturer: SAM Model: 4e5 Serial#: 1297691186 DC off: [ 7.399] (II) AMDGPU(0): EDID for output DisplayPort-1 [ 7.400] (II) AMDGPU(0): EDID for output HDMI-A-1 [ 7.402] (II) AMDGPU(0): EDID for output DVI-D-1 [ 7.440] (II) AMDGPU(0): EDID for output DVI-I-1 [ 7.440] (II) AMDGPU(0): Manufacturer: SAM Model: 4e5 Serial#: 1297691186 The system still works as expected with both keyboard and mouse, so X does start properly otherwise. This also happens with AMDGPU-PRO on Ubuntu 18.04 LTS.
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