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    SubjectRe: no backlight on radeon after recent kernel "upgrade"s
    On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko <kernel@onerussian.com> wrote:

    > Dear Kernel Developers,
    >
    > Since the most recent successful for me kernel 2.6.19-rc6-mm1, I've
    > tried few times to build more recent snapshots and now finally
    > 2.6.20-mm2. In all those cases I have a sad outcome -- kernel boots but
    > at some point during boot (few moments after Penguin icon in the top left
    > corner appears), light turns off... I still can see something, especially
    > if I light a strong flashlight at a sharp angle.
    >
    > I've enabled back-light support and lcd support for those unsuccessful
    > kernels (with all backlight support features disabled kernel boots
    > ok and backlight shines as bright as always)
    >
    > All my changes of values for files under
    > /sys/class/backlight/radeonbl0
    > had no impact on the screen. Also I had no files under /sys/class/lcd.
    >
    > Running
    > radeontool light off
    > caused complete turning off of LCD - I could not see
    > anything anymore.
    >
    > sony's spictl -b had no effect as well.
    >
    > Config can be found at
    > http://www.onerussian.com/Linux/bugs/nobacklight.1/config-2.6.20-mm2
    > lshw
    > http://www.onerussian.com/Linux/bugs/nobacklight.1/lshw
    > other details are available from
    > http://www.onerussian.com/Linux/bugs/nobacklight.1/
    >
    > Could you please advise?

    (cc's added)

    Is 2.6.20 broken? I assume the latest 2.6.20-gitN snapshot are failing..
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