Array CD 5

[Daniel Stone]

On Mon, Feb 21, 2005 at 09:36:49AM +0100, Thibaut Varene wrote:
> On Mon, 21 Feb 2005 10:19:33 +1100, Daniel Stone <daniel at fooishbar.org> wrote:
> > If we're not using a laptop, we try a DDC probe: if it succeeds, we use
> > as much information from there as possible.  If it fails, we ask the
> > user which resolution we're using, and write out our own sync ranges.
> 
> As far as I understand this, if the probe fails we compute sync ranges
> for a 60Hz vert refresh. Would it be possible to assume that at least
> any reasonnable monitor out there can do 75Hz at its nominal
> resolution?

No, becuase the native refresh rate of LCDs is 75Hz; desktop panels
are reasonably liberal (but still not good), and laptop panels will
just flat-out refuse 75Hz modes.

> Standing from the PoV of end user not necessarily having a fsckin clue
> how to deal with sync ranges, I think that the pain of having to cope
> with such a low refresh rate would be leveraged if we setup 75Hz by
> default...

Sure, but unfortunately it would break stuff.  I mean, don't get me
wrong -- 60Hz is utter crap.  I have 80Hz on my CRT, and it still hurts
my eyes relative to the LCD.  But, unfortunately, 60Hz is the only mode
that works absolutely everywhere, and the goal if DDC fails is to get an
image up on the screen, no matter what.

> I'm also considering those of us using architectures where DDC probe
> fails no matter what ;)

Aye.  I accept that it sucks, and it would've been nice to get ddcprobe
as part of vbetool using x86emu for hoary, but such is life, I suppose.

:) d
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