[Intel-gfx] LVDS Undetected

[Mike Isely]

On Wed, 11 May 2011, Travis Allen wrote:

> I am now using a nightly build of the driver from last night. 
> 
> > 
> > video=LVDS-1:e
> 
> Unfortunately this didn't enable the LVDS output (at least xrandr 
> doesn't show it as an available output with a default boot - ie no 
> xorg customization).  Does this require an xorg.conf for the output to 
> show up?

Not strictly.  You can also exercise the head with just the framebuffer 
console since every DRM-driven device can also be made to operate as a 
framebuffer device.  I've successfully done testing that way.

You're probably going to need more info for how to actually control the 
video timings.  Before KMS came along you did everything in xorg.conf.  
With KMS in the picture and the ability to use this stuff outside of 
xorg, there's actually a whole 'nother way to set the video mode, via 
that "video=" kernel parameter syntax.


> 
>  
> > 
> > But right now since the project I'm on absolutely needs this ability,
> > then we're probably just going to end up maintaining the (pretty
> > simple)
> > patch out-of-tree.
> 
> So I don't have to go searching through the archives, can you give me 
> an approximate date you posted this patch so I can try it out?

Look for a patch series posted by me to this list back on March 17th.  
There are 3 patches in 4 posts.  The first post explains everything so 
you'll definitely want to look at that as well.  The patch series 
implements the ability to disable scaling - the first solution I 
mentioned earlier.

IIRC, two of the three patches have been merged, the controversial one 
that actually enables fixed mode timing however has not been merged.  

I also have this stuff rebased against a 2.6.38.5 vanilla kernel, if 
interested.

  -Mike


-- 

Mike Isely
isely @ isely (dot) net
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