[i810/modesetting] No output with an S-Video adapter

[Frédéric Riss]

Le mercredi 03 janvier 2007 à 15:05 -0800, Eric Anholt a écrit :
> On Wed, 2007-01-03 at 21:43 +0100, Frederic Riss wrote:
> > Hi,
> > 
> > After the recent modifications to the modesetting branch to work with
> > Xorg 7.1, I can get it running happily on my Ubuntu Edgy installation
> > with a CRT monitor. However, if I plug a DVI -> S-Video adapter, then
> > there's no output on the connected TV. Xorg.log attached. (This is on
> > a Mac Mini running without bootcamp, if that matters).
> 
> Interesting.  So the DVI -> S-Video adapter actually shows up on the
> integrated tv-out port, rather than SDVO for example.  We'd been
> speculating about how those would work.
> 
> Have you tried using xrandr (remotely, obviously :)) to switch the modes
> offered on the TV-out to see if any of them display anything for you?

Hadn't tried, but I obviously should have :

On server start (no output):
fred at minifunky:~$ xrandr 
 SZ:    Pixels          Physical       Refresh
*0    800 x 600    ( 433mm x 271mm )  *60  
 1    640 x 480    ( 433mm x 271mm )   60  
 2   1280 x 800    ( 433mm x 271mm )   60  
 3   1280 x 768    ( 433mm x 271mm )   60  
 4   1024 x 768    ( 433mm x 271mm )   99   60  
Current rotation - normal
Current reflection - none
Rotations possible - normal left inverted right 
Reflections possible - none

None of the modes except the last one give me an output. But:

fred at minifunky:~$ xrandr -s 4

WORKS !

Excellent. Note that OS X seems to be able to generate output for other
resolutions, at least 800x600 (I haven't tried more, I've got to rush
right now).

> Looks like we need to go buy one and get it working with our mini.

If I can do anything to help you getting things right (except sending my
adapter :-)), just ask!