Public bug reported:

AMD APU A10-8700p + R6 M360
GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=pt client splash acpi_backlight=vendor 
i8042.dumbkbd=1"
Laptop HP 
firmware folders amdgpu and radeon cloned from git
Using padoka ppa drivers

Blank screen after few minutes in unity session

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
Uname: Linux 4.8.1-040801-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
Date: Sun Oct 16 00:05:41 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c5) (prog-if 
00 [VGA controller])
   Subsystem: Hewlett-Packard Company Carrizo [103c:80b5]
InstallationDate: Installed on 2016-04-22 (177 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: HP HP Pavilion Notebook
ProcEnviron:
 LANGUAGE=es_CL:es
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=es_CL.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.1-040801-generic 
root=UUID=93369433-cd13-4e94-9f0c-0193dfeca58e ro quiet iommu=pt client splash 
acpi_backlight=vendor i8042.dumbkbd=1 crashkernel=384M-:128M vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/27/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.19
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 80B5
dmi.board.vendor: HP
dmi.board.version: 81.29
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF.19:bd05/27/2016:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80B5:rvr81.29:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: HP
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.71+git1610081859.a44c9c3~x~padoka0
version.libgl1-mesa-dri: libgl1-mesa-dri 
1:12.1~git161008214900.185be15~x~padoka0
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 
1:12.1~git161008214900.185be15~x~padoka0
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:7.7.99+git1609301659.3fc839f~x~padoka0
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git1610081915.696f58f~x~padoka0
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12+git1607251455.6473b68~x~padoka0
xserver.bootTime: Sun Oct 16 02:57:26 2016
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-0ubuntu0.1
xserver.video_driver: amdgpu

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


** Tags: amd64 apport-bug compiz-0.9 third-party-packages ubuntu xenial

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https://bugs.launchpad.net/bugs/1633802

Title:
  Blank screen amdgpu - Ubuntu 16.04 - Mainline kernel 4.8.1

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