Messages in this thread | | | Date | Thu, 22 Feb 2007 01:11:18 +0000 (GMT) | From | James Simmons <> | Subject | Re: [Linux-fbdev-devel] no backlight on radeon after recent kernel "upgrade"s |
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> 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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