Comment 0 for bug 1576228

There seems to be a bug somewhere in [ kernel OR xorg OR nvidia proprietary driver ] in the display stack.
After the laptop ( dell XPS L501X ) resumes from suspend there are wide black borders around all windows with close/minimize/maximize buttons blacked out.

[ image attached: black border on all windows ]

It occurs inconsistently, as it doesn't happen every time the computer resumes.
( Slight possibility that it usually occurs after long suspend, i.e. resuming after long time ).
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Also there seems to be certain amount of performance degradation as if the graphics driver was running at half-strength ( and I don't mean software-only rendering, neither do I mean switch over to nouveau open source driver )

The "nVidia X Server Settings" app suggests its in maximum performance mode.

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Adhoc Workaround: switch display layout ( I have an external monitor/TV attached to HDMI port ) changing anything such as arrangement or resolution of the displays, etcetera... corrects the black border issue ( and also possibly performance issue )

This bug has been present in Ubuntu 14.04, 15.04, 15.10 and now in 16.04 as well. ( It was probably present before that as well )

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p.s. this is only partial duplicate of black border issue as the black borders appear on every window, not just windows with new header bars or client side decoration...

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.02.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:02:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 361.42 Tue Mar 22 18:10:58 PDT 2016
 GCC version: gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2)
.proc.driver.nvidia.warnings.fbdev:
 Your system is not currently configured to drive a VGA console
 on the primary VGA device. The NVIDIA Linux graphics driver
 requires the use of a text-mode VGA console. Use of other console
 drivers including, but not limited to, vesafb, may result in
 corruption and stability problems, and is not supported.
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
BootLog: [ OK ] Started LSB: Speech Dispatcher.
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: Thu Apr 28 18:43:37 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-21-generic, x86_64: installed
 nvidia-361, 361.42, 4.4.0-21-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GF108M [GeForce GT 435M] [10de:0df2] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell GF108M [GeForce GT 435M] [1028:046e]
InstallationDate: Installed on 2016-04-23 (4 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Dell Inc. XPS L501X
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-21-generic root=UUID=f657e606-ac2a-49cd-9f3e-fca6a315338d ro rootflags=subvol=@ quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/26/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0J1VR3
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A08
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd07/26/2011:svnDellInc.:pnXPSL501X:pvrA08:rvnDellInc.:rn0J1VR3:rvrA08:cvnDellInc.:ct8:cvrA08:
dmi.product.name: XPS L501X
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
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.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
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: Thu Apr 28 17:09:49 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.3-1ubuntu2