apport information

** Attachment added: "ProcEnviron.txt"

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  When using external monitor displays become unstable

Status in linux package in Ubuntu:

Bug description:
  I am using a HP Pavilion dv6 with ATI Mobility Radeon HD 5650 Graphics.  
After upgrading to ubuntu 16.04 LTS using Gallium 0.4 on AMD REDWOOD (DRM 
2.43.0, LLVM 3.8.0).  I get an unstable display when I plug in my external 
display through the VGA port.  The system keeps cycling through the display 
options using only one display, then both then extended and then the other 
display.  This happens every 10-15 seconds.
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
   /dev/snd/pcmC0D0p:   herman     1805 F...m pulseaudio
   /dev/snd/controlC0:  herman     1805 F.... pulseaudio
   /dev/snd/controlC1:  herman     1805 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=bf329afe-facd-48b6-8900-b8dac03d336b
  InstallationDate: Installed on 2014-04-25 (901 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic 
root=UUID=c9235e01-b5fa-4362-bfca-c6763140abba ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
   linux-restricted-modules-4.4.0-38-generic N/A
   linux-backports-modules-4.4.0-38-generic  N/A
   linux-firmware                            1.157.3
  Tags:  xenial
  Uname: Linux 4.4.0-38-generic x86_64
  UpgradeStatus: Upgraded to xenial on 2016-09-21 (22 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True 11/07/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.29
  dmi.board.asset.tag: Base Board Asset Tag 1448
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 65.38
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
dmi:bvnHewlett-Packard:bvrF.29:bd11/07/2011:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr048E100000242B10000020000:rvnHewlett-Packard:rn1448:rvr65.38:cvnHewlett-Packard:ct10:cvrN/A: HP Pavilion dv6 Notebook PC
  dmi.product.version: 048E100000242B10000020000
  dmi.sys.vendor: Hewlett-Packard

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