On Thu, Jun 2, 2011 at 12:14 PM, Ike Panhc <ike.pan@xxxxxxxxxxxxx> wrote: > On 06/02/2011 05:48 PM, Corentin Chary wrote: >> Hi Ike, >> Why do you want to add /sys/devices/platform/ideapad/brightness and >> Â Â /sys/devices/platform/ideapad/backlight ? >> Both of these files should be handled by the generic backlight class >> (using brightness and bl_power). > > This is within VPC2004. In DSDT they are different device from generic > backlight. > > and I try bl_power but can not turning off power of whole LCD. No idea > how screensaver do it, looks like just cut off video signal. What I wanted to say is that you should use the generic backlight class (!=driver) to expose these. You can look at asus-wmi.c to see how it's done. Then users will be able to choose the backlight implementation using acpi_backlight=vendor or acpi_backlight=video. -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
