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Re: WQXGA LCD for OS/2?

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On Tue, 2 Oct 2012 04:27:32 UTC, Steve Wendt <spamsux@forgetit.org> wrote:

> On 09/30/12 12:54 pm, Dariusz Piatkowski wrote:
> 
> >>> The monitor does require DVI-D Dual Link hookup, which I think the ATI card
> >>> already provides, although I'm checking on this because while the card does have
> >>> 2 DVI-I connectors I'm not actualy sure if the 2560x1600 resolution is
> >>> supported, nor whether the drivers will combine the 2 DVI-I ports into a single
> >>> signal feed.
> >>
> >> The odds of it working are low - I can tell you it was never tested.
> >
> > OK, so I'm thinking the question therefore is more about the following: if
> > 'gamode add' allows me to add this resolution to the list, and if I can get all
> > the timings/settings synced up between the SNAP and the LCD itself, is there
> > anything int he SNAP drivers themselves that may prevent me from successfully
> > running at that resolution?
> >
> > So when you say the odds are 'low'...what sort of reservations do you have?
> 
> You expressed it yourself in the quoted text - dual link DVI.  As I 
> recall, 1920x1200 is the upper limit for a single TMDS.  Even that 
> required some extra tricks, since 1600x1200 was the limit with regular 
> timings:
> http://www.anandtech.com/show/1799/2
> 
> 6-7 years ago, video cards with 2 DVI connectors were rather rare; LCD 
> panels at the time also weren't all that great, so anyone who cared 
> about image quality and didn't have a fortune to spend stuck with a CRT 
> for a few more years.

Well, there is good news and bad news. 

Good news: the ATI X850 XT PE card I have does have 2 DVI connectors

Bad news: both the connectors on this card are single link DVI, which as you 
pointed out simply do not have the required bandwidth to support the 2560x1600 
resolution

Sooo...I'm thinking it's 'game over' as far as that attempt goes. The LCD panel,
used at that, is much to pricey to risk that kind of a $$$.

Strangely enough, depending on what chip actually implements the TMDS protocol 
(most were Sil chips) some of them did support dual link DVI interface when both
single link DVI ports were NOT used. The card auto-detected this and would 
switch over to run the display MAX OUT only on that single port. I simply have 
no way to tell whether the genuine ATI card I have falls into this though. 

For what it's worth I did attempt the 'gamode add' command:

[G:\snap]gamode add 2560 1600 32
Failed to add mode 2560 x 1600 x 32!

So at least the driver is refusing this, but that could also be due to the LCD 
capability being detected as NOT supporting that mode (my current 245T LCD that 
is).

Thanks again Steve!!!

BTW: I've been meaning to ask you : where the heck in the driver is the max 
memory and GPU clock stored? Or better yet, how the heck can I find it?

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Thread

WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-09-29 13:59 +0000
  Re: WQXGA LCD for OS/2? Steve Wendt <spamsux@forgetit.org> - 2012-09-29 14:34 -0700
    Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-09-30 19:54 +0000
      Re: WQXGA LCD for OS/2? Steve Wendt <spamsux@forgetit.org> - 2012-10-01 21:27 -0700
        Re: WQXGA LCD for OS/2? tholen@antispam.ham - 2012-10-02 11:55 +0000
          Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-04 00:45 +0000
            Re: WQXGA LCD for OS/2? tholen@antispam.ham - 2012-10-04 12:01 +0000
              Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-06 16:42 +0000
          Re: WQXGA LCD for OS/2? "Alex Taylor" <mail.me@reply.to.address> - 2012-10-08 09:06 -0500
            Re: WQXGA LCD for OS/2? tholen@antispam.ham - 2012-10-08 22:56 +0000
              Re: WQXGA LCD for OS/2? Steve Wendt <spamsux@forgetit.org> - 2012-10-09 21:06 -0700
                Re: WQXGA LCD for OS/2? tholen@antispam.ham - 2012-10-10 16:50 +0000
                Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-10 23:57 +0000
                Re: WQXGA LCD for OS/2? tholen@antispam.ham - 2012-10-11 00:02 +0000
                Re: WQXGA LCD for OS/2? Steve Wendt <spamsux@forgetit.org> - 2012-10-10 20:42 -0700
                Re: WQXGA LCD for OS/2? "Mark Dodel" <madodelNOSPAM@ptd.net> - 2012-10-11 15:20 -0500
                Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-13 02:34 +0000
                Re: WQXGA LCD for OS/2? Roderick Klein <rwklein@mensys.nl> - 2012-11-01 23:56 +0100
        Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-04 00:43 +0000
          Re: WQXGA LCD for OS/2? Steve Wendt <spamsux@forgetit.org> - 2012-10-03 21:06 -0700
            Re: WQXGA LCD for OS/2? "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2012-10-06 17:46 +0000

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