desktop seems to restart every time I try to click on the launchpad or tap alt key

[Emilio Utrilla Sobrino]

Every time I click on launchpad the entire desktop gets off and restart. It's the same only with taping the alt key (but not with the atl gr key).

To launch an app in the launchpad, once the desktop has restarted (all the windows opened are restaured automatically), I can doubleclick in the app (for example firefox or any other) and the app launch, but desktop and launchpad restarts again.

I've tried to update but the message tells that the software it's updated.

The system it's 16.04.3 LTS and it was working fine until yesterday

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13
Uname: Linux 4.13.0-26-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.15
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: Sun Jan 14 13:00:46 2018
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Mobile 4 Series Chipset Integrated Graphics Controller [103c:3069]
   Subsystem: Hewlett-Packard Company Mobile 4 Series Chipset Integrated Graphics Controller [103c:3069]
InstallationDate: Installed on 2017-11-29 (46 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
MachineType: Hewlett-Packard HP G61 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-26-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/13/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.20
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3069
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 21.14
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.20:bd10/13/2009:svnHewlett-Packard:pnHPG61NotebookPC:pvrRev1:rvnHewlett-Packard:rn3069:rvr21.14:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.family: 103C_5335KV
dmi.product.name: HP G61 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard
upstart.unity-panel-service-lockscreen.log:
 (unity-panel-service:2332): Gtk-CRITICAL **: gtk_icon_info_get_filename: assertion 'icon_info != NULL' failed

 (unity-panel-service:2332): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.83-1~16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~16.04.2
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Sun Jan 14 12:56:35 2018
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.5-0ubuntu2~16.04.1
xserver.video_driver: modeset