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    SubjectRe: no backlight on radeon after recent kernel "upgrade"s
    I am sorry on the delay

    > > On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko <kernel@onerussian.com> wrote:
    > > > 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
    > > > >...<
    > > Is 2.6.20 broken? I assume the latest 2.6.20-gitN snapshot are failing..
    -mm's have been failing since some time after .19-rc6-mm1. I believe
    I've tried 2.6.19-mm? with the same luck

    > It would be extremely useful to know which kernel versions you tested
    > and which ones failed. There are a number of backlight changes which are
    > just in 2.6.20-mm1 and -mm2 which it would be useful to rule out or
    > identify as the cause.
    I didn't mention 2.6.20-mm1 and got to see -mm2 so it is the one which
    Iv'e tried, but, once again, I experienced the same issue with 19-mm?
    kernels.

    I built 2.6.20-mm2 without backlight support
    $> grep BACKLIGH /boot/config-2.6.20-mm2
    # CONFIG_BACKLIGHT_LCD_SUPPORT is not set
    # CONFIG_FB_BACKLIGHT is not set
    # CONFIG_FB_RIVA_BACKLIGHT is not set
    # CONFIG_FB_RADEON_BACKLIGHT is not set

    that "eliminated" the problem. Also I can see the screen with pure
    2.6.20 with backlight support (whatever it does since after
    loading lcd, backlight modules, my /sys/class/{lcd,backlight} are empty):

    *$> grep BACKLIGH /boot/config-2.6.20
    # CONFIG_FB_BACKLIGHT is not set
    CONFIG_BACKLIGHT_LCD_SUPPORT=y
    CONFIG_BACKLIGHT_CLASS_DEVICE=m
    CONFIG_BACKLIGHT_DEVICE=y


    > Also, do you normally see files under /sys/class/lcd?
    nope... after I load lcd module, no files under :-/ regardless either it
    is mm or not. But there are files under /sys/class/backlight/ for mm2
    compiled with backlight support (whenever the screen is dark as per my
    original email)

    --
    .-.
    =------------------------------ /v\ ----------------------------=
    Keep in touch // \\ (yoh@|www.)onerussian.com
    Yaroslav Halchenko /( )\ ICQ#: 60653192
    Linux User ^^-^^ [175555]


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