[Bug 2142355] Re: Screen dimming does not respect inactivity timeout

The setting to switch off the display is "Screen Blank". Please ignore
"Dim Screen" because that's only for laptops with working backlight
controls.


** Summary changed:

- Screen dimming does not respect inactivity timeout
+ Backlight options are visible on a desktop machine

** Package changed: ubuntu => linux (Ubuntu)

** Changed in: linux (Ubuntu)
Status: Incomplete => New

** Summary changed:

- Backlight options are visible on a desktop machine
+ Backlight options are visible (and nonfunctional) on a desktop machine

** Changed in: linux (Ubuntu)
Importance: Undecided => Low

** Also affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New

** Changed in: gnome-control-center (Ubuntu)
Importance: Undecided => Low

** Changed in: gnome-control-center (Ubuntu)
Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/2142355

Title:
Backlight options are visible (and nonfunctional) on a desktop machine

Status in gnome-control-center package in Ubuntu:
Won't Fix
Status in linux package in Ubuntu:
New

Bug description:
I set the screen to dim after a period of inactivity.
The screen does not dim after this period of inactivity.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-100.100-generic 6.8.12
Uname: Linux 6.8.0-100-generic x86_64
NonfreeKernelModules: wl
.tmp.unity_support_test.0:

ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
BootLog:

CasperMD5CheckResult: unknown
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Feb 21 11:59:34 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
DkmsStatus:
broadcom-sta/6.30.223.271, 6.8.0-100-generic, x86_64: installed
broadcom-sta/6.30.223.271, 6.8.0-94-generic, x86_64: installed
virtualbox/7.0.16, 6.8.0-100-generic, x86_64: installed
virtualbox/7.0.16, 6.8.0-94-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [1043:8534]
MachineType: ASUS All Series
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-100-generic root=/dev/mapper/ubuntu--vg-root ro acpi_enforce_resources=lax quiet splash acpi_backlight=video vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2018
dmi.bios.release: 4.6
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3503
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97-PRO(Wi-Fi ac)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3503:bd04/18/2018:br4.6:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ97-PRO(Wi-Fiac):rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuAll:
dmi.product.family: ASUS MB
dmi.product.name: All Series
dmi.product.sku: All
dmi.product.version: System Version
dmi.sys.vendor: ASUS
version.compiz: compiz 1:0.9.14.2+22.10.20220822-0ubuntu12
version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.4-0ubuntu1~22.04.1
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-2build3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2ubuntu0.1

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