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    Subjectno backlight on radeon after recent kernel "upgrade"s
    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
    had no impact on the screen. Also I had no files under /sys/class/lcd.

    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
    other details are available from

    Could you please advise?
    Yaroslav Halchenko
    Research Assistant, Psychology Department, Rutgers-Newark
    Student Ph.D. @ CS Dept. NJIT
    Office: (973) 353-5440x263 | FWD: 82823 | Fax: (973) 353-1171
    101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102
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