sytem restart spontaneously

[Jacques Lerin]

many errors in the syslog file

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.10.0-42.46~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.14
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
Date: Fri Dec 8 18:13:10 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Device [8086:22b1] (rev 35) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:06ac]
InstallationDate: Installed on 2017-12-01 (7 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
MachineType: Dell Inc. Inspiron 15-3552
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-42-generic.efi.signed root=UUID=37c501cb-0ddd-431e-b11c-d759f08a3f7f ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/22/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 4.0.13
dmi.board.name: 079W3P
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvr4.0.13:bd12/22/2016:svnDellInc.:pnInspiron15-3552:pvr4.0.13:rvnDellInc.:rn079W3P:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 15-3552
dmi.product.version: 4.0.13
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1~ubuntu16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.7-0ubuntu0.16.04.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.7-0ubuntu0.16.04.2
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

[penalvch (penalvch)]

Jacques Lerin, thank you for reporting this and helping make Ubuntu better.

1) Is this still reproducible if you update to the latest HWE stack as per https://wiki.ubuntu.com/Kernel/LTSEnablementStack ?

2) Are you having a temperature issue? One may confirm following https://help.ubuntu.com/community/SensorInstallHowto .

[Jacques Lerin (jackcrack)]

Thank you for your answer.

As it happens, the bug stopped some time after I reloaded the grub files a few weeks ago.
Since then a number of patches have been edited which may have also corrected the problem.
I really don't know what happened but now I can enjoy Ubuntu without fearing a crash.

I had no temperature problems.

you can close the case.

Thank you again