Comment 0 for bug 1642078

Problem description:
The laptop starts up fine but the screen is black; even though the screen is black I can hear the drum sound prompting me to log in. After rebooting laptop all is well with the screen and I have a fully functional system. Sometimes, though, I have to restart twice.

After some search I found people reporting the same issue:
https://ubuntuforums.org/showthread.php?t=2337274

or similar issues:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/1577074?comments=all

Additional information:

1) Ubuntu release:
Description: Ubuntu 16.04.1 LTS
Release: 16.04

2) Package version:
xorg:
  Instalados: 1:7.7+13ubuntu3
  Candidato: 1:7.7+13ubuntu3
  Tabla de versión:
 *** 1:7.7+13ubuntu3 500
        500 http://co.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

3) Computer information:
Processor: AMD A10-8700 Radeon R6
Graphic card: Gallium 0.4 on AMD Carrizo (DRM 3.1.0, LLVM 3.8.0)

Kind regards,
Victor

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue Nov 15 17:56:57 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c5) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Carrizo [103c:8246]
InstallationDate: Installed on 2016-11-10 (5 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: HP HP Pavilion Notebook
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-47-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/03/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.03
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 8246
dmi.board.vendor: HP
dmi.board.version: 98.11
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.03:bd05/03/2016:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn8246:rvr98.11:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: HP
version.compiz: compiz 1:0.9.12.2+16.04.20160714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Tue Nov 15 17:21:18 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.3-1ubuntu2.2
xserver.video_driver: amdgpu