Double brightness events

[Jackson Doak]

Has a launchpad bug been created for this?

On Thursday, November 13, 2014, Joonas Saarinen <jza at saunalahti.fi> wrote:

> Hi,
>
> For years, Ubuntu has had this bug where a lot of laptops react to
> brightness adjustment in steps of 2 (or even 3). I believe this is not by
> design (correct me if wrong).
>
> It seems that the brightness keypress is handled in multiple places.
> Possibly the OS does the adjustment, but does not consume the event and
> then BIOS does another adjustment.
>
> Some machines can be fixed with this trick:
> # echo N > /sys/module/video/parameters/brightness_switch_enabled
>
> Are there plans to fix this bug? It's quite obvious one and immediately
> strikes you when you install and start using Ubuntu on a laptop.
>
> Some affected laptops: Dell E4300, Asus F200CA, HP 6910p, Fujitsu E751...
>
> Joonas Saarinen
>
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