Public bug reported:

The night light feature does not work in these cases
 * Computer's screen shuts off due to timeout, and then is reactivated.
 * Computer is brought back from suspend
 * Computer desktop is locked, and unlocked using the password

In all these cases, the night light icon is present in the notification
area, and it says "Night Light On". But the screen temperature is that
of normal daylight.

In all these cases, disabling and re-enabling the night light using the
notification area icon reactivates the night light.

Version information

Gnome desktop on Ubuntu 4.13.0-36.40-generic 4.13.13

4.13.0-36-generic #40-Ubuntu SMP Fri Feb 16 20:07:48 UTC 2018 x86_64
x86_64 x86_64 GNU/Linux

17.10 Artful Aardvark

Hardware : MSI GP62 QE - with i5-6300HQ, using the Intel graphics driver.
---
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: talonx 2732 F...m pulseaudio
 /dev/snd/controlC0: talonx 2732 F.... pulseaudio
CurrentDesktop: GNOME-Classic:GNOME
DistroRelease: Ubuntu 17.10
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=7808c7a8-dd4d-41e7-a2f2-032701229a6a
InstallationDate: Installed on 2016-05-05 (659 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Micro-Star International Co., Ltd. GP62 6QE
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-36-generic 
root=UUID=70280d26-8667-4d1b-9bbd-683373c14707 ro priority=low quiet splash 
acpi_osi= i8042.nomux=1 i8042.reset i8042.nopnp i8042.noloop 
usbcore.autosuspend=-1 vt.handoff=7
ProcVersionSignature: Ubuntu 4.13.0-36.40-generic 4.13.13
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-36-generic N/A
 linux-backports-modules-4.13.0-36-generic N/A
 linux-firmware 1.169.3
Tags: artful
Uname: Linux 4.13.0-36-generic x86_64
UpgradeStatus: Upgraded to artful on 2017-11-02 (114 days ago)
UserGroups: adm bumblebee cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/25/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: E16J5IMS.113
dmi.board.asset.tag: Default string
dmi.board.name: MS-16J5
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: REV:0.A
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 10
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: Default string
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrE16J5IMS.113:bd04/25/2016:svnMicro-StarInternationalCo.,Ltd.:pnGP626QE:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-16J5:rvrREV0.A:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrDefaultstring:
dmi.product.name: GP62 6QE
dmi.product.version: REV:1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1752680

Title:
  Night light does not work in some cases

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