> 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
You need to explictly enable the backlight for your fbdev driver. It
doesn't do the selecting magically for you.
Jus do a make "favorite"config and go to the fbdev menu and select the
backlight option for your fbdev driver.
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