[xenial] unity session does not start

[Alexey Balmashnov]

$ lsb_release -rd
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04

$ apt-cache policy unity
unity:
  Installed: 7.4.0+16.04.20160401.1-0ubuntu1
  Candidate: 7.4.0+16.04.20160401.1-0ubuntu1
  Version table:
 *** 7.4.0+16.04.20160401.1-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

Yesterday did:
apt update
apt upgrade

A lot of packages were upgraded, have not seen any failures.

Rebooted system, everything seemed to be OK, until I tried to login... Just got background color and nothing more. No dash, no top panel, no window decorations.

Today repeated update hoping for better. Nothing changed.

If you have any bright ideas, please help.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160401.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
Uname: Linux 4.4.0-17-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
.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 20160405 (Ubuntu 5.3.1-13ubuntu4)
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
BootLog:

CurrentDesktop: Unity
Date: Thu Apr 7 20:01:39 2016
DistUpgraded: 2016-02-24 21:53:29,420 DEBUG enabling apt cron job
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-15-generic, x86_64: installed
 bbswitch, 0.8, 4.4.0-16-generic, x86_64: installed
 bbswitch, 0.8, 4.4.0-17-generic, x86_64: installed
 nvidia-361-updates, 361.42, 4.4.0-16-generic, x86_64: installed
 nvidia-361-updates, 361.42, 4.4.0-17-generic, x86_64: installed
GraphicsCard:
 NVIDIA Corporation GF108M [GeForce GT 540M] [10de:0df4] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASRock Incorporation GF108M [GeForce GT 540M] [1849:0df4]
InstallationDate: Installed on 2016-01-06 (91 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-17-generic.efi.signed root=UUID=d4f27b9e-0cff-49e1-8392-a41aa520bd85 ro noprompt persistent quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to xenial on 2016-02-24 (42 days ago)
dmi.bios.date: 09/16/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.10
dmi.board.name: HM65-MXM
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.10:bd09/16/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnHM65-MXM:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
version.compiz: compiz 1:0.9.12.2+16.04.20160331-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu1
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 1:7.6.1-1ubuntu2
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 7 19:52:00 2016
xserver.configfile: default
xserver.errors:

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

xserver.version: 2:1.18.3-1ubuntu2

[Alexey Balmashnov (a.balmashnov)]

By advice 'k1l' on #ubuntu+1 moved away .config folder. It solved the issue for me.

[Andrea Azzarone (azzar1)]

Closing as per comment #2.