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[Bug 1663637] Re: Image flickering on eDP screen since 4.4.0-59 kernel upgrade

 

Would it be possible to test a couple of kernels?

First test the latest Xenial kernel:
https://launchpad.net/~canonical-kernel-security-team/+archive/ubuntu/ppa/+build/12080749


If that kernel still has the bug, please test the last kernel version before you hit the bug, -58:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/11758956

For both these kernel, you need to install both the linux-image and
linux-image-extra .deb packages.

Thanks in advance!

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Tags added: kernel-da-key

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Xenial)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1663637

Title:
  Image flickering on eDP screen since 4.4.0-59 kernel upgrade

Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Xenial:
  Incomplete

Bug description:
  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)

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