[Bug 106159] When connecting or disconnecting a displayport to a DP hub with 4.16.2+ kernel, hard freeze with frozen video output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106159

            Bug ID: 106159
           Summary: When connecting or disconnecting a displayport to a DP
                    hub with 4.16.2+ kernel, hard freeze with frozen video
                    output
           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: sass.joel at gmail.com

Created attachment 138956
  --> https://bugs.freedesktop.org/attachment.cgi?id=138956&action=edit
dpkg -l |grep mesa

When connecting a displayport monitor to an active DP hub with working outputs,
my workstation experiences a hard freeze requiring a cold reboot. Network
services stop responding, including ping and SSH.

root at nope:~# uname -a
Linux nope 4.16.2+ #1 SMP Fri Apr 13 17:51:14 CEST 2018 x86_64 x86_64 x86_64
GNU/Linux

root at nope:~# lsmod |grep -i amdgpu
amdgpu               2695168  2
chash                  16384  1 amdgpu
i2c_algo_bit           16384  1 amdgpu
gpu_sched              20480  1 amdgpu
ttm                    94208  1 amdgpu
drm_kms_helper        143360  1 amdgpu
drm                   348160  6 amdgpu,gpu_sched,ttm,drm_kms_helper

Mesa drivers from padoka PPA

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