Public bug reported:
Steps to reproduce:
1. Set brightness to a comfortable level (e.g., 40)
2. Lock the screen or suspend
3. Login again
4. Brightness jumps to maximum (or a much higher level
Expected behavior:
Brightness should remain unchanged across lock/unlock cycles.
Actual behavior:
Brightness increases significantly after login. You can observe the increase in
the brightness in the lockscreen when it prompts for the password.
More details:
ubuntu-25.04
linux-6.14.0-23-generic
gnome-48
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: linux-image-6.14.0-23-generic 6.14.0-23.23
ProcVersionSignature: Ubuntu 6.14.0-23.23-generic 6.14.5
Uname: Linux 6.14.0-23-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: shanjiv 3613 F.... pipewire
shanjiv 3617 F.... wireplumber
/dev/snd/seq: shanjiv 3613 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 12 18:35:18 2025
InstallationDate: Installed on 2025-07-09 (3 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
MachineType: LENOVO 83JM
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-23-generic
root=UUID=f4d48a9b-2869-4ff6-a423-0a39ab2efbf0 ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.14.0-23-generic N/A
linux-backports-modules-6.14.0-23-generic N/A
linux-firmware 20250317.git1d4c88ee-0ubuntu1.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/06/2025
dmi.bios.release: 1.49
dmi.bios.vendor: LENOVO
dmi.bios.version: PZCN49WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76485 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad Pro 5 16IAH10
dmi.ec.firmware.release: 1.49
dmi.modalias:
dmi:bvnLENOVO:bvrPZCN49WW:bd06/06/2025:br1.49:efr1.49:svnLENOVO:pn83JM:pvrIdeaPadPro516IAH10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76485WIN:cvnLENOVO:ct10:cvrIdeaPadPro516IAH10:skuLENOVO_MT_83JM_BU_idea_FM_IdeaPadPro516IAH10:
dmi.product.family: IdeaPad Pro 5 16IAH10
dmi.product.name: 83JM
dmi.product.sku: LENOVO_MT_83JM_BU_idea_FM_IdeaPad Pro 5 16IAH10
dmi.product.version: IdeaPad Pro 5 16IAH10
dmi.sys.vendor: LENOVO
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2116781
Title:
On Ubuntu 25.04, whenever I lock the screen and log back in or suspend
and log back in, the screen brightness increases sharply, ignoring
previously set brightness levels.
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