VESA DDC/CI display backlight

Daniel van Vugt daniel.van.vugt at
Tue Sep 10 01:33:50 UTC 2013


If it's part of DDC then certainly Mir might be the place to implement 
that. I don't think it's a high priority for the team in 13.10 though.

Maybe it should be discussed as part of:

- Daniel

On 09/09/13 01:52, Alexander GamePad wrote:
> Well, this is a feature that is presents in most displays, but is
> hardly ever used by software.
> Xorg could handle backlight of notebook displays, but not of standalone
> displays.
> There is a project called ddccontrol:
> The core of this project is not really tough to implement inside Mir,
> because it is just a simple wrapper of I2C protocol.
> Practical usage:
> - Unified backlight interface (ACPI from notebooks, DDC/CI, maybe, HDMI)
> - Ability to control display backlight from System Settings, xbacklight
> (well, mirbacklight, of course ;) ) and from any other display tool.
> - Ability to create such a cool feature as automatic backlight (using a
> webcam).
> So, is there a possibility to include DDC support in Mir?

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