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    SubjectRe: no backlight on radeon after recent kernel "upgrade"s
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    On Wed, 2007-02-21 at 23:10 -0200, Henrique de Moraes Holschuh wrote:
    > On Wed, 21 Feb 2007, Henrique de Moraes Holschuh wrote:
    > > > * 'cat brightness' != 'cat actual_brightness' upon bootup (doesn't have
    > >
    > > Hmm, I see this in 2.6.20 too. And brightness is the one that is buggy. I
    > > will look into it.
    >
    > Now, that was trivial to fix, and I will reply with a patch (which will have
    > Cc's trimmed to just the MLs and Richard).
    >
    > But really, should not the backlight *class* be doing the initial update of
    > the brightness? Looks like something that every device would need to do if
    > the class doesn't do it, and unlike the "power it off on unregister" thing,
    > I can't think of a reason not to do it for every backlight class device.
    >
    > Please ACK the ibm-acpi patch in my next message if you'd like me to submit
    > it to Len Brown for merging into 2.6.21, or NACK it if you'd rather do it in
    > the backlight class core.

    We can't change the backlight class code since some hardware can't read
    from the device, only write to it. Initialisation in that case is a bit
    different.

    Richard



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