[Bug 103102] Cannot wake-up with an AMD RX 480 on Linux 4.13 and Linux 4.14

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103102

            Bug ID: 103102
           Summary: Cannot wake-up with an AMD RX 480 on Linux 4.13 and
                    Linux 4.14
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: freedesktop at psydk.org

I used to suspend/resume my system on Ubuntu 17.04 and it was fine. I installed
Ubuntu 17.10 that comes with Linux 4.13 and now my system cannot wake-up
anymore.

I submitted the bug on Ubuntu's web site. I tried Linux 4.14 but the problem
was still present. Then I've been told to open a bug here.

The original bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1720622

/var/log/kern.log shows several errors regarding amdgpu.

My RX 480 is connected to one single screen with DisplayPort. The problem
occurs with both wayland and xorg.

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