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

Submitted by Joel Sass

Assigned to Default DRI bug account

Link to original bug (#106159)

Description

Created attachment 138956
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@nope:# uname -a
Linux nope 4.16.2+ #1 (closed) SMP Fri Apr 13 17:51:14 CEST 2018 x86_64 x86_64 x86_64 GNU/Linux

root@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

Attachment 138956, "dpkg -l |grep mesa":
mesa_out