Brightness resets to full when on/off battery

Bug #1647020 reported by Ryan Finnie on 2016-12-03
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-power-manager (Ubuntu)
Low
Unassigned

Bug Description

In yakkety, when my ThinkPad X250 goes on or off battery, the screen is reset to full brightness. Xenial and before did not have this problem. I have not found any other instances which trigger this (lid close, etc).

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: gnome-power-manager 3.22.0-1ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-28.30-generic 4.8.6
Uname: Linux 4.8.0-28-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Dec 2 22:16:21 2016
InstallationDate: Installed on 2015-03-07 (637 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: gnome-power-manager
UpgradeStatus: Upgraded to yakkety on 2016-12-01 (1 days ago)

Ryan Finnie (fo0bar) wrote :
tags: added: regression-release
Changed in gnome-power-manager (Ubuntu):
assignee: nobody → Canonical Desktop Team (canonical-desktop-team)
Sebastien Bacher (seb128) wrote :

Thank you for your bug report. That's more likely to be a kernel issue than a desktop one though, gnome-power-manager is only including a frontend to see battery stats nowadays. Is there any chance you could try with a xenial kernel to see if that works better?

Otherwise the desktop component handling screen settings is unity-settings-daemon but that codebase didn't change much in recent cycles... note that level changing when disc/connecting from/to a/c is an old issue though it could depends of the driver.

Unassigning the desktop team since that doesn't seem like an high priority issue nor a desktop regression.

Changed in gnome-power-manager (Ubuntu):
assignee: Canonical Desktop Team (canonical-desktop-team) → nobody
importance: Undecided → Low
status: New → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for gnome-power-manager (Ubuntu) because there has been no activity for 60 days.]

Changed in gnome-power-manager (Ubuntu):
status: Incomplete → Expired
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