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[Launchpad Bug Tracker <1663637@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu Xenial) because there has been no activity
for 60 days.]

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

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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:
  Expired
Status in linux source package in Xenial:
  Expired

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)
  --- 
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jmaillar   3511 F.... pulseaudio
   /dev/snd/controlC1:  jmaillar   3511 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=/dev/mapper/main-swap
  MachineType: Hewlett-Packard HP ZBook 15 G2
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic.efi.signed root=UUID=79ab29f5-d9eb-4aff-bfb8-8639c60401cb ro quiet
  ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-66-generic N/A
   linux-backports-modules-4.4.0-66-generic  N/A
   linux-firmware                            1.157.8
  Tags:  xenial xenial
  Uname: Linux 4.4.0-66-generic x86_64
  UpgradeStatus: Upgraded to xenial on 2016-04-21 (321 days ago)
  UserGroups: adm cdrom dip disk kismet kvm libvirtd lpadmin lxd plugdev sambashare sudo vboxusers wireshark
  _MarkForUpload: True
  dmi.bios.date: 04/25/2016
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: M70 Ver. 01.15
  dmi.board.name: 2253
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 03.12
  dmi.chassis.asset.tag: CND54722DC
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrM70Ver.01.15:bd04/25/2016:svnHewlett-Packard:pnHPZBook15G2:pvrA3009CD10002:rvnHewlett-Packard:rn2253:rvrKBCVersion03.12:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ZBook 15 G2
  dmi.product.version: A3009CD10002
  dmi.sys.vendor: Hewlett-Packard
  --- 
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jmaillar   3496 F.... pulseaudio
   /dev/snd/controlC1:  jmaillar   3496 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=/dev/mapper/main-swap
  MachineType: Hewlett-Packard HP ZBook 15 G2
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-41-generic root=UUID=79ab29f5-d9eb-4aff-bfb8-8639c60401cb ro quiet
  ProcVersionSignature: Ubuntu 4.8.0-41.44~16.04.1-generic 4.8.17
  RelatedPackageVersions:
   linux-restricted-modules-4.8.0-41-generic N/A
   linux-backports-modules-4.8.0-41-generic  N/A
   linux-firmware                            1.157.8
  Tags:  xenial xenial
  Uname: Linux 4.8.0-41-generic x86_64
  UpgradeStatus: Upgraded to xenial on 2016-04-21 (322 days ago)
  UserGroups: adm cdrom dip disk kismet kvm libvirtd lpadmin lxd plugdev sambashare sudo vboxusers wireshark
  _MarkForUpload: True
  dmi.bios.date: 04/25/2016
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: M70 Ver. 01.15
  dmi.board.name: 2253
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 03.12
  dmi.chassis.asset.tag: CND54722DC
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrM70Ver.01.15:bd04/25/2016:svnHewlett-Packard:pnHPZBook15G2:pvrA3009CD10002:rvnHewlett-Packard:rn2253:rvrKBCVersion03.12:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ZBook 15 G2
  dmi.product.version: A3009CD10002
  dmi.sys.vendor: Hewlett-Packard

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