Public bug reported:
# System Details Report
---
## Report details
- **Date generated:** 2026-07-22 14:38:52
## Hardware Information:
- **Hardware Model:** ASUSTeK COMPUTER INC. S551LB
- **Memory:** 8.0 GiB
- **Processor:** Intel® Core™ i7-4500U × 4
- **Graphics:** Intel® HD Graphics 4400 (HSW
GT2)
- **Graphics 1:** NV108
- **Disk Capacity:** 774.2 GB
## Software Information:
- **Firmware Version:** S551LB.212
- **OS Name:** Ubuntu 26.04 LTS
- **OS Build:** (null)
- **OS Type:** 64-bit
- **GNOME Version:** 50
- **Windowing System:** Wayland
- **Kernel Version:** Linux 7.0.0-28-generic
the light/dark regulation doesn´t work with the new kernel "7.0.0-28-generic"
but it worked perfectly in the last kernel.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jose 4237 F.... wireplumber
/dev/snd/controlC0: jose 4237 F.... wireplumber
/dev/snd/seq: jose 4220 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 22 14:35:24 2026
InstallationDate: Installed on 2025-09-12 (313 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: ASUSTeK COMPUTER INC. S551LB
ProcEnviron:
LANG=es_ES.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=9fc0eba4-8766-4bc5-8c50-2edc815dd93d ro quiet splash
asus_nb_wmi.wapf=0
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/25/2014
dmi.bios.release: 4.6
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: S551LB.212
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: S551LB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrS551LB.212:bd04/25/2014:br4.6:svnASUSTeKCOMPUTERINC.:pnS551LB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnS551LB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:skuASUS-Ultrabook:pfaS:
dmi.product.family: S
dmi.product.name: S551LB
dmi.product.sku: ASUS-Ultrabook
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2161515
Title:
fail in light/dark regulation
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