Public bug reported:
When changing the brightness, the brightness of the display doesn't
actually change on the latest kernel Linux 7.0.0-28-generic. -27 works.
OS: Kubuntu 26.04 LTS (Resolute Raccoon) x86_64
Host: HP ENVY x360 Convertible 15-bp1xx
Kernel: Linux 7.0.0-28-generic
Uptime: 6 mins
Packages: 2613 (dpkg), 9 (flatpak), 11 (snap)
Shell: bash 5.3.9
Display (LGD056E): 1920x1080 in 16", 60 Hz [Built-in]
DE: KDE Plasma 6.6.5
WM: KWin (Wayland)
WM Theme: Breeze
Theme: Breeze (Dark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
Cursor: breeze (30px)
Terminal: yakuake 25.12.3
CPU: Intel(R) Core(TM) i7-8550U (8) @ 4.00 GHz
GPU: Intel UHD Graphics 620 @ 1.15 GHz [Integrated]
Memory: 2.56 GiB / 14.87 GiB (17%)
Swap: 0 B / 4.00 GiB (0%)
Disk (/): 311.19 GiB / 896.61 GiB (35%) - ext4
Local IP (wlo1): 192.168.31.153/24
Battery (LK03055XL): 87% [Discharging]
Locale: en_US.UTF-8
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: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jimmy 3410 F.... wireplumber
/dev/snd/seq: jimmy 3406 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Wed Jul 29 20:05:09 2026
InstallationDate: Installed on 2026-07-14 (15 days ago)
InstallationMedia: Ubuntu-Server 26.04 "Resolute Raccoon" - Release amd64
(20260420.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 04f2:b593 Chicony Electronics Co., Ltd HP Wide Vision
FHD Camera
Bus 001 Device 003: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: HP HP ENVY x360 Convertible 15-bp1xx
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-28-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
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: 08/06/2021
dmi.bios.release: 15.50
dmi.bios.vendor: Insyde
dmi.bios.version: F.50
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 83C8
dmi.board.vendor: HP
dmi.board.version: 32.68
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 32.68
dmi.modalias:
dmi:bvnInsyde:bvrF.50:bd08/06/2021:br15.50:efr32.68:svnHP:pnHPENVYx360Convertible15-bp1xx:pvrType1ProductConfigId:rvnHP:rn83C8:rvr32.68:cvnHP:ct31:cvrChassisVersion:sku4FG36UA#ABA:pfa103C_5335KVHPEnvy:
dmi.product.family: 103C_5335KV HP Envy
dmi.product.name: HP ENVY x360 Convertible 15-bp1xx
dmi.product.sku: 4FG36UA#ABA
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug regression-update resolute wayland-session
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/bugs/2162098/+attachment/5987753/+files/dmesg.txt
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https://bugs.launchpad.net/bugs/2162098
Title:
Intel Graphics Brightness Stuck
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