[Bug 10418] Powerbook DVI out only works when booted with monitor attached

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=10418





------- Comment #30 from agd5f at yahoo.com  2007-10-04 06:06 PST -------
(In reply to comment #29)
> (In reply to comment #28)
> > You probably either have a different TMDS chip in your laptop that needs an
> > alternate setup, or the chip needs different set up for single vs. dual link
> > mode.  What size panel are you using? 
> 
> right now I'm using a 1600x1200 external panel, which afaik can be driven
> single link (as I've been using it on my single-link mac mini as well :-)

Right.  I saw your log after I replied.  that should be single link.  It's
probably a different TMDS chip.  If you have an sil chip, try reading back the
values from 0x00 and 0x02.  Those are the vendor and device ids for the chip. 
you can find links to a bunch of sil and other TMDS chip databooks here:
http://wiki.x.org/wiki/DataSheets
It also may be an ordering issue. The sil164, you need to set up the chip
properly before setting the enable bit (bit 0 IIRC) in 0x08.

> 
> ...except that it doesn't compile (the #defined constants are missing) :-)
> 

Fixed now in git.


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