Alan Hourihane wrote:

> On Mon, Jun 10, 2002 at 07:13:55 -0500, Watzlavick wrote:
> > I realize you (nor I) have the schematics for the I-Opener, but do you know
> > how apm interacts with DPMS?
>
> Not on the I-Opener. Sorry.
>
> Alan.
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The I-Opener is really just a dumbed-down laptop.  In your experience, does the
trident driver seem to turn off the backlight via DPMS on other laptops?  If
DPMS properly blanks the screen, can I assume it's basically working even if the
backlight stays on?  I can do some more research and debugging but I'm not sure
where to begin.  I was poking through the Cyberblade i7 Tech Ref Manual and I
found the section talking about ENPBLT.  I can't probe the pins directly because
it's a BGA part - ideally, I'd look to see whether the driver was turning off
the ENPBLT signal on the Cyberblade to see if it was a driver problem or if
there was something in between the Cyberblade and display.

The bios has three options for "video off method":  DPMS support, blank screen,
and V/H SYNC+blank.  I've had it set to DPMS but maybe there's another circuit
getting in the way.  I'll try V/H SYNC to see if the display will take that.
One more question if I may:  what is the trident driver trying to do in the
various DPMS states?  That might help me understand the mechanism for backlight
control on the I-Opener.  If you can point me to the proper file, I can look to
see what is going on.

Thanks again,
-Bob

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