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    SubjectRe: [linux-pm] Re: [PATCH, RFC] [1/3] Generic in-kernel AC status
    On Čt 09-02-06 09:53:44, Gabor Gombas wrote:
    > On Wed, Feb 08, 2006 at 05:08:58PM +0000, Matthew Garrett wrote:
    > > The backlight interface only supports exporting and setting the current
    > > brightness. For various bits of hardware, the AC and DC brightnesses are
    > > stored separately. Drivers would need to know which brightness value to
    > > export to userspace. I have an HP backlight driver here which would
    > > benefit from this, and I'm looking at the same issue for a Panasonic
    > > one.
    > I don't know the backlight interface but extending it to export all
    > available brightness values would seem more logical to me.
    > If I'd had a laptop I'd hate if I could only set the DC brightness if I
    > plug out the AC power.

    Still "set current brightness" operation makes a lot of sense.
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