Comment 94 for bug 43572

This does not work even if the module is loaded and running. Please advise

On Tue, Mar 25, 2008 at 2:48 PM, Christian Schuerer <email address hidden> wrote:

> With the currently used kernel, it's not possible to load this module
> automatically (I think this will be available in hardy+1). But it's easy
> to get your system load this module at boot time, but adding 'dcdbas' in
> one empty line of the file '/etc/modules'. You can do this by issuing
> the following command in a terminal:
>
> sudo sh -c "echo 'dcdbas' >> /etc/modules"
>
> --
> Dell Laptops don't talk to HAL about brightness correctly
> https://bugs.launchpad.net/bugs/43572
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in Hardware Abstraction Layer (HAL): Fix Released
> Status in Source Package "hal" in Ubuntu: Fix Released
> Status in Source Package "linux" in Ubuntu: Fix Released
> Status in Source Package "linux-source-2.6.22" in Ubuntu: Won't Fix
>
> Bug description:
> This was discovered in Bug #38531. It seems that Dell laptops are able to
> change the brightness settings in the Bios but this does not talk properly
> to ACPI, HAL or anything else.
>
> >From http://bugzilla.gnome.org/show_bug.cgi?id=337580 :
> "Some code needs to be written to do this - there's no ACPI method to do
> it, but
> it can be done via an SMBios call from userspace."
>
> It means that the system does not know, and cannot change, the brightness
> of the monitor.
>

--
Vyas Sanzgiri
573 202 0165
http://ejvyas.blogspot.com