You have been subscribed to a public bug:
1. Ubuntu info is listed blow:
```
Description: Ubuntu 20.04.2 LTS
Release: 20.04
```
2. the `gnome-control-center` package version is
```
gnome-control-center:
已安装：1:3.36.5-0ubuntu1
候选： 1:3.36.5-0ubuntu1
版本列表：
*** 1:3.36.5-0ubuntu1 500
500 http://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-updates/main amd64
Packages
100 /var/lib/dpkg/status
1:3.36.1-1ubuntu5 500
500 http://mirrors.tuna.tsinghua.edu.cn/ubuntu focal/main amd64 Packages
```
3. I expect when the Night Light settings are set, then it should be
working as specified.
4. Instead the Night Light settings only work for a few seconds, and
then it went back to the original display state as if Night Light is not
enabled.
This only happens when I'm booting with kernel 5.4.0-66-generic, and
everything works like a charm when booting with kernel 5.4.0-65-generic.
Please help looking into this.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-66.74-generic 5.4.86
Uname: Linux 5.4.0-66-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
BootLog: Error: [Errno 13] 权限不够: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Feb 24 22:43:23 2021
DistUpgraded: 2020-08-01 23:39:12,134 DEBUG refresh of snap gtk-common-themes
succeeded
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev
0b) (prog-if 00 [VGA controller])
Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:5021]
Subsystem: Lenovo Radeon R7 M260 [17aa:5021]
InstallationDate: Installed on 2019-11-04 (478 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
MachineType: LENOVO 20EH0001CD
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-66-generic
root=UUID=e96f932e-c0e2-496e-b84d-653876b6b3ea ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-08-01 (206 days ago)
dmi.bios.date: 11/20/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: J5ET50WW (1.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20EH0001CD
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50518 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrJ5ET50WW(1.21):bd11/20/2015:svnLENOVO:pn20EH0001CD:pvrThinkPadE450c:rvnLENOVO:rn20EH0001CD:rvrSDK0E50518STD:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad E450c
dmi.product.name: 20EH0001CD
dmi.product.sku: LENOVO_MT_20EH_BU_Think_FM_ThinkPad E450c
dmi.product.version: ThinkPad E450c
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal gnome-control-center ubuntu
--
Night Light setting only working for a few seconds then It's gone
https://bugs.launchpad.net/bugs/1916763
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