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When NVidia 820m is enabled in UEFI, after wake up from suspend mode i have hang on black screen (ctrl + alt + Fx is not working).
Also i report about this bug to Nvidia (on official blob drivers problem is here), and they have reproduced this problem and will submit info to engineering nvidia.
I try add this parameter ADD_PARAMETERS="--quirk-dpms-on" to /etc/pm/config.d/config, and after wake up from suspend mode i see lockscreen (ubuntu greeter), but mouse, keyboard not working again. Again hang system, but with image on display!

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.19.1-0ubuntu3
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 24 22:39:29 2015
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0866]
   Subsystem: Acer Incorporated [ALI] GeForce 820M [1025:0868]
InstallationDate: Installed on 2015-11-24 (0 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Acer Extensa 2510G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic.efi.signed root=UUID=f6094b80-a9d8-4e96-8077-66b0e59e75b0 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-nouveau
UdevLog: Error: [Errno 2] Нет такого файла или каталога: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/23/2015
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.27
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: BA50_HB
dmi.board.vendor: Acer
dmi.board.version: V1.27
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.27:bd03/23/2015:svnAcer:pnExtensa2510G:pvrV1.27:rvnAcer:rnBA50_HB:rvrV1.27:cvnAcer:ct10:cvrChassisVersion:
dmi.product.name: Extensa 2510G
dmi.product.version: V1.27
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Tue Nov 24 22:32:11 2015
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
 NOUVEAU(G0): [XvMC] Failed to initialize extension.
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                5566 
 vendor                                     CMN
xserver.version: 2:1.17.2-1ubuntu9

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 latest-bios-1.27 ubuntu wily
-- 
Black screen, when nvidia enabled after wakeup from suspend
https://bugs.launchpad.net/bugs/1519461
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