[PATCH] i810: Add workaround for bad BIOS mode on Fujitsu laptops

Lukas Hejtmanek xhejtman at fi.muni.cz
Mon Jan 29 10:48:28 PST 2007

On Mon, Jan 29, 2007 at 09:16:31AM -0800, Eric Anholt wrote:
> Yeah, the BIOS parsing code is based on how Intel's BIOS tables are
> formatted, but your laptop manufacturer may have chosen to mess with
> things.  We've already got one workaround for how a vendor played with
> the formatting, and could certainly do more if that's appropriate.  The
> other possibility is if your laptop happens to expose DDC for the panel,
> we could fix the driver to trust DDC EDID data over what we pull out of
> the BIOS.  However, if you don't have DDC, I'd be fine with adding your
> patch.

and what about to provide an option into xorg.conf to let the user specify
native LVDS mode or even whole modeline?

Moreover, a laptop usualy possesses pre-configured LVDS, i.e., Pipe is
pre-configured to native mode as well as DPLL registers. You should consider
to read these values as a fallback.

Lukáš Hejtmánek

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