Comment 80 for bug 311716

works fine now :)

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2009/1/16 Stefan Bader <email address hidden>

> Its a proc file so it is always 0. But you have to be root to read it.
> It will be a binary blob.
>
> --
> The slider brightness Applet has value inverted after the last update
> (2.6.27-11)
> https://bugs.launchpad.net/bugs/311716
> You received this bug notification because you are a direct subscriber
> of a duplicate bug.
>
> Status in The Linux Kernel: Incomplete
> Status in "linux" source package in Ubuntu: Fix Released
> Status in linux in Ubuntu Intrepid: Fix Committed
>
> Bug description:
> Binary package hint: gnome-power-manager
>
> The slider brightness Applet has value (%) inverted after the last update.
> When moves slider to up (plus) the screen brightness goes down. When moves
> slider to down (minus) the screen brightness goes up. I'm using version is
> 2.24.0-0ubuntu 8.1.
>
>
>
> SRU Justification
>
> Justification: ACPI brightness handling inverted or not functioning for
> several systems. acpi fixes committed to the proposed kernels expanded use
> of ACPI calls to handle brightness. This however exposes a number of
> systems which have broken ACPI brightness handling
>
> Impact: a number of laptops reported either inverted brightness handling or
> totally non-functional brightness control
>
> Fix Description: the fix adds an ACPI brightness validator which suppresses
> use of ACPI calls which are deemed broken.
>
> Patch:
> http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-intrepid.git;a=commit;h=096be4a4f49d781c0e7e8a54f9c0ff086570236a
>
> Risks: as we are supressing ACPI brightness support we may suppress it
> where it is required
>
> TEST CASE: see bug report
>