Brightness changes multiple times during boot up and doesn't get back to the last used one

Bug #334206 reported by Filippo Argiolas
2
Affects Status Importance Assigned to Milestone
gnome-power-manager (Ubuntu)
Confirmed
Undecided
Unassigned
linux (Ubuntu)
Won't Fix
Undecided
Unassigned

Bug Description

After upgrading to Jaunty brightness settings are not remembered anymore when rebooting or when disconnecting power cable.
During boot process brigthness changes multiple times:
- at BIOS screen brightness gets correctly restored to last used one
- when ubuntu starts loading brightness is increased (to maximum level?)
- when gnome-power-manager starts it is set to maximum no matter what level it was set last time and doesn't even care if the laptop is on battery or on power cable.

$ lsb_release -rd
Description: Ubuntu jaunty (development branch)
Release: 9.04

$ apt-cache policy gnome-power-manager
gnome-power-manager:
  Installato: 2.24.2-2ubuntu5
  Candidato: 2.24.2-2ubuntu5
  Tabella versione:
 *** 2.24.2-2ubuntu5 0
        500 http://it.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

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Filippo Argiolas (fargiolas) wrote :
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Filippo Argiolas (fargiolas) wrote :
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Filippo Argiolas (fargiolas) wrote :
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Filippo Argiolas (fargiolas) wrote :
description: updated
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Filippo Argiolas (fargiolas) wrote :

Confirming the issue for gnome-power-manager: it sets brightness level to 100 as soon as it starts.
There is still something else that does the same while ubuntu is loading but still I don't know which package.

pippo@tux:~$ killall gnome-power-manager
pippo@tux:~$ cat /proc/acpi/video/VGA/LCD/brightness
levels: 20 28 36 44 52 60 68 76 84 93 100
current: 20
pippo@tux:~$ gnome-power-manager --verbose --no-daemon --immediate-exit > gpm.log
pippo@tux:~$ cat /proc/acpi/video/VGA/LCD/brightness
levels: 20 28 36 44 52 60 68 76 84 93 100
current: 100

Attaching the log produced

Changed in gnome-power-manager:
status: New → Confirmed
description: updated
Revision history for this message
Jeremy Foshee (jeremyfoshee) wrote :

Hi Filippo,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/lucid.

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 334206

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: needs-kernel-logs
tags: added: needs-upstream-testing
tags: added: kj-triage
Changed in linux (Ubuntu):
status: New → Incomplete
Revision history for this message
Brad Figg (brad-figg) wrote : Unsupported series, setting status to "Won't Fix".

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: Incomplete → Won't Fix
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