Regression: Can't adjust Samsung N110 screen brightness in Karmic, could in Jaunty

[Josh Smith]

Binary package hint: acpi-support

In Jaunty, my screen would automatically dim/brighten when the power was removed/plugged in, and I could also use keyboard shortcuts to adjust the brightness. Under Karmic beta, this doesn't happen.

I /think/ this is a problem with acpi-support, but I'm no expert, so I could easily be wrong.

ProblemType: Bug
Architecture: i386
Date: Sun Oct 18 19:11:10 2009
DistroRelease: Ubuntu 9.10
Package: acpi-support 0.129
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: acpi-support
Tags: ubuntu-unr
Uname: Linux 2.6.31-14-generic i686

[Steve Langasek (vorlon)]

Thank you for taking the time to report this bug and help to improve Ubuntu.

> I /think/ this is a problem with acpi-support

It's not; screen brightness policy is determined by the desktop. Reassigning to gnome-power-manager.

[Josh Smith (saxsux)]

Hi Steve,

I'm not sure this is a policy problem.

It's probably my fault for not explaining clearly; the problem isn't that the screen doesn't dim, it's that it _can't_ dim. Ubuntu has completely lost the ability to dim my netbook's screen, which is now stuck at maximum brightness.

[Nick Vallianos (nval)]

I had the same problem. Samsung has released a firmware upgrade for N110. I upgraded and now it works seamlessly. The problem is you need to have windows installed as well to do the upgrade, since it comes as an exe file. I wouldn't try to run it from wine, as this may mess up the bios.

[Victor Vargas (kamus)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please open a terminal and execute: apport-collect 454861 ? It will attach the necessary information to this report. Also you can submit more information for it by looking to https://wiki.ubuntu.com/DebuggingGNOMEPowerManager , Thanks in advance.

[Josh Smith (saxsux)]

Hey Kamus,

I updated my firmware as Nick Vallianos suggested, and I'm not having this problem any more - would it still be worth running apport-collect?

[Launchpad Janitor (janitor)]

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