brightness doesent work/ dell 1501 inspiron

Bug #157607 reported by christoforever on 2007-10-27
Affects Status Importance Assigned to Milestone
gnome-power-manager (Ubuntu)

Bug Description

Dell 1501 insprion
2 gig ram
amd turion dual core
bios 2.4.1

Brightness hot keys, and applets not working in gutsy. I just recently did a bios upgrade from 1.4 to 2.4.1, and i think this may be the problem. Seeing as how before the upgrade the brightness still worked. Im not sure what they could have drastically changed in the bios to make the brightness stop working though.

Luka Renko (lure) wrote :

Is this Kubuntu or Ubuntu? Which version?
Can you provide data as requested in ?

Changed in hal:
assignee: nobody → lure
status: New → Incomplete

I am using Ubuntu Gutsy Gibbon Final. Dell Bios 2.4.1, which i just updated
to from 1.7.

On 11/1/07, Luka Renko <email address hidden> wrote:
> Is this Kubuntu or Ubuntu? Which version?
> Can you provide data as requested in
> ?
> ** Changed in: hal (Ubuntu)
> Assignee: (unassigned) => Luka Renko (lure)
> Status: New => Incomplete
> --
> brightness doesent work/ dell 1501 inspiron
> You received this bug notification because you are a direct subscriber
> of the bug.

jpittack (john-pittack) wrote :

Using a different bios then 1.7 will work in Hardy at the moment.

Christoforever, care to comment if this is still an issue in the latest Hardy Alpha release? If this is resolved, please feel free to close this report (ie change the status to 'Fix Released') Thanks.

Orson Jones (orson-launchpad) wrote :

Power Manager Brightness Applet 2.20.0
Ubuntu 7.10 amd64

The applet doesn't work, but running the following command as root does work.
echo -n [brightness] > /proc/acpi/video/VGA/LCD/brightness
where [brightness] is one of: 12 25 37 50 62 75 87 100

nyvalbanat (valentinv) wrote :

It turns out the acpi signal is received by the hook, only it is not processed correctly. I used the brightness setting suggested by Orson Jones (above) and connected to the acpi signals for the Fn+Up/Down shortcuts. Take a look:

Luka Renko (lure) on 2009-05-01
Changed in hal (Ubuntu):
assignee: Luka Renko (lure) → nobody

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner.
There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test the current Ubuntu development version (10.10). If you can test it, and it is still an issue, we would appreciate if you could upload updated logs by running apport-collect <bug #>, and any other logs that are relevant for this particular issue.

affects: hal (Ubuntu) → gnome-power-manager (Ubuntu)

Thank you for taking the time to report this bug and helping to make Ubuntu better. The version of Ubuntu your using is in End of Life status. More information may be found at: As well, the package your using is updated and issue you reported should be reproducible with the live environment of the Desktop CD development release - Maverick Meerkat. It would help us greatly if you could test with it so we can work on getting it fixed in the next release of Ubuntu. You can find more about the development release at Please repost a detailed error report and update the bug status. Thanks again and we appreciate your help.

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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