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Image on my HiDPI 4K eDP screen (HP zbook 15) is flickering since I
upgraded my kernel to 4.4.0-59.

With 4.4.0-53 kernel, everything is ok.

I have try :
  - 4.4.0-59
  - 4.4.0-62
  - 4.8.0-36 (from linux-generic-hwe-16.04)

All of us make my eDP screen flickering when it was alone. Because the
amazing things is here : when my laptop is docked and get two other
screen (one fullHD and one 2K), everything get back to normal. Even on
my eDP 4K screen !

I don't know how to know where the problem come from. Kernel ? radeon.ko
? xorg-video-radeon ? Gnome Shell ? Is amdgpu.ko usable ? How to test it
? ... need help.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-generic-hwe-16.04 4.8.0.36.8
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Feb 10 16:09:52 2017
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-meta-hwe
UpgradeStatus: Upgraded to xenial on 2016-04-21 (294 days ago)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial
-- 
Image flickering on eDP screen since 4.4.0-59 kernel upgrade
https://bugs.launchpad.net/bugs/1663637
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