[Intrepid] SRU: Backport fix for handling the brightness control on acer-wmi

[manoj.iyer at canonical.com]

ACK

Cheers
--- manjo

On Mon, 11 May 2009, Stefan Bader wrote:

> SRU justification:
>
> Impact: With the introduction of the upstream acpi backlight handling we 
> introduced a inverse check which causes the acer-wmi driver only to be active 
> if the acpi driver is present.
>
> Fix: Invert the check.
>
> Testcase: Without acpi support on acer laptops, there is no backlight control 
> device.
>
> Note: there still seems to be another problem with the acer-wmi interface in 
> general but this is definitely a required step to the solution.
>
> -- 
>
> When all other means of communication fail, try words!
>
>
>