No login with Unity and user home on NFSv3

[Thomas Mack]

Logging in with Unity fails, when the user home directory is mounted via NFSv3.

Logging in succeeds with other desktop managers (GNOME, GNOME classic, LXDE, TWM, ...) or when mounting the home directory via NFSv4.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: unity 7.5.0+17.04.20170407.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
.tmp.unity_support_test.1:

ApportVersion: 2.20.4-0ubuntu4
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:Unity7
Date: Tue May 9 21:02:57 2017
DistUpgraded: Fresh install
DistroCodename: zesty
DistroVariant: ubuntu
GraphicsCard:
 VMware SVGA II Adapter [15ad:0405] (prog-if 00 [VGA controller])
   Subsystem: VMware SVGA II Adapter [15ad:0405]
InstallationDate: Installed on 2017-05-08 (1 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: VMware, Inc. VMware Virtual Platform
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic root=UUID=b349df17-ed9a-4690-8be9-705e8f7cba17 ro quiet splash
Renderer: Software
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/14/2014
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: 440BX Desktop Reference Platform
dmi.board.vendor: Intel Corporation
dmi.board.version: None
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd04/14/2014:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: VMware Virtual Platform
dmi.product.version: None
dmi.sys.vendor: VMware, Inc.
version.compiz: compiz 1:0.9.13.1+17.04.20170109-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.3-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.3-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.14-0ubuntu1
xserver.bootTime: Tue May 9 21:00:41 2017
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input AT Translated Set 2 keyboard KEYBOARD, id 7
 input VirtualPS/2 VMware VMMouse MOUSE, id 8
 input VirtualPS/2 VMware VMMouse MOUSE, id 9
xserver.errors:
 AIGLX: reverting to software rendering
 No surface to present from.
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs: Output Virtual2 Virtual3 Virtual4 Virtual5 Virtual6 Virtual7 Virtual8
xserver.version: 2:1.19.3-1ubuntu1
xserver.video_driver: vmware