[Intel-gfx] BACKLIGHT property for KMS case
mjg59 at srcf.ucam.org
Tue Aug 18 05:08:37 PDT 2009
On Tue, Aug 18, 2009 at 01:52:03PM +0200, Matthias Hopf wrote:
> I tried to use that on an hp netbook here, but somehow this had no
It'll depend what interface is in use - for instance, ACPI typically
won't let you disable the backlight completely.
> Anyway, I'd like to use the "0 is off, 1 is minimum" semantics in the
> RandR properties - we'd probably have to do some magic in the driver.
In that case you'll have to add 1 to the values when dealing with most
> power is only allowed to have 0 and 1 as values?
According to the header files, 0 is on, 1-3 are DPMS states, 4 is fully
off. See include/linux/fb.h - it's the FB_BLANK_* defines.
Matthew Garrett | mjg59 at srcf.ucam.org
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