display backlight turns full on every minute
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gnome-settings-daemon (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
Today I started working at about 6 am with lights off before the sunrise. So I set the display backlight on my notebook at the minimum. I used notebook keyboard buttons for this. Then I realised that night light (which makes display colors warm) is already off. I opened Settings window, navigated to Devices -> Monitors screen and set the night light to the manual mode. I changed the upper limit to 8 am. The night light turned on immediately. Then I closed the Settings window. I worked for about an hour till 7 am. Then suddenly the backlight of the display started to turn full on about every minute. I changed it to the previous low level with the buttons but it kept turning full on in after about a minute. Changing any settings in the Power tab didn't help. The only thing that helped was:
chmod -w /sys/class/
After I ran the command the problem is gone. The only effect I still see is: the slider in the Power tab of the settings window is switching to the full on position about every minute. Without any input from me of course.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xorg 1:7.7+19ubuntu3
ProcVersionSign
Uname: Linux 4.13.0-17-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Dec 10 07:35:33 2017
DistUpgraded: Fresh install
DistroCodename: artful
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Mobile 4 Series Chipset Integrated Graphics Controller [1025:0283]
Subsystem: Acer Incorporated [ALI] Mobile 4 Series Chipset Integrated Graphics Controller [1025:0283]
InstallationDate: Installed on 2017-11-08 (31 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: Acer TravelMate 8371
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=ru_RU.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/26/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.27
dmi.board.
dmi.board.name: TravelMate 8371
dmi.board.vendor: Acer
dmi.board.version: PSMBOU-1234567
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.
dmi.modalias: dmi:bvnAcer:
dmi.product.family: Intel_Mobile
dmi.product.name: TravelMate 8371
dmi.product.
dmi.sys.vendor: Acer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.83-1
version.
version.
version.
version.
version.
version.
version.
affects: | xorg (Ubuntu) → gnome-settings-daemon (Ubuntu) |