[Intel-gfx] [PATCH] drm/i915: disable LVDS downclock by default

[Jesse Barnes]

On Thu, 14 Jan 2010 16:16:10 -0500
Nick Bowler <nbowler at elliptictech.com> wrote:

> Is it really a defective BIOS?  I don't have my laptop handy right
> now, but the lower refresh mode is reported in the EDID and can be set
> successfully (no idea if the change actually does anything).  However,
> there is a visible artifact whenever a transition occurs.

No, it's possible the BIOS has it right but we're failing to transition
gracefully.

Your platform should support automatic hardware frequency switching.
You could try disabling that (clear the has_pipe_cxsr field of your
driver struct in i915_drv.c) and see if the manual method works for you.

-- 
Jesse Barnes, Intel Open Source Technology Center