[Intel-gfx] [PATCH] drm/i915: fix screen blank issue in TV detect

Zhenyu Wang zhenyuw at linux.intel.com
Mon Sep 14 04:06:01 CEST 2009

On 2009.09.11 10:51:06 -0700, Eric Anholt wrote:
> On Fri, 2009-09-11 at 13:19 +0800, Zhenyu Wang wrote:
> > In load time, this one trys to detect TV by current encoder state
> > instead of load-detect method. Because load-detect will set mode
> > which disable VGA mode entirely, but couldn't restore back later.
> > Destroy VGA mode which is the mode after system boot caused black
> > screen problem, although load fbcon or X later could setup the mode
> > on LVDS without problem.
> > 
> > That fixes screen blank issue seen on Macbook after boot and before
> > fbcon or X kicks in, actually this affects all laptops with TV out,
> > or without real port but our TV encoder probe fails to detect.
> > 
> > Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> I think a black screen after boot and before fbcon loads sounds like the
> right behavior.

Really? So this looks like you want to force fbcon loading for kernel,
I also thought that way, but I don't know if we can do that in i915 module?

Open Source Technology Center, Intel ltd.

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