[TriLUG] Display adapter and cable to monitor

[Wes Garrison via TriLUG]

Most computer HDMI ports and single-link DVI only support up to 1900x1200.

Dual-link DVI <https://en.wikipedia.org/wiki/Digital_Visual_Interface>
supports up to 2560x1600 (which includes 2560x1440).

DVI on most Macs that I've seen are single-link, so don't go that way.

You'll have to do either DisplayPort on both ends, or *TWO* HDMI cables and
hope your distribution supports link aggregation.

That's why there's 2 ports on the monitor.

What model is this monitor?  I'm surprised it doesn't have Dual-link DVI.

-Wes

_________________________________
Wesley S. Garrison
Network Engineer
Xitech Communications, Inc.
phone:  (919) 260-0803
fax:       (919) 932-5051
__________________________________
"Lead us not into temptation, but deliver us from email."

On Thu, Feb 2, 2017 at 6:26 AM, Ron Kelley via TriLUG <trilug at trilug.org>
wrote:

> Brian,
>
> Specifically, what video card is this?  Wikipedia seems to indicate the
> video card is 2009 vintage based on the “Cedar” chipset info.  Is that
> correct?  If so, you might be better off getting something like an NVidia
> GeForce 730 fan-less card with HDMI for about $60 (https://www.newegg.com/
> Product/Product.aspx?Item=1FT-001K-00003&cm_re=nvidia_730-_-
> 1FT-001K-00003-_-Product).  Then, you can use your HDMI-to-HDMI cable at
> 2560x1440.  If you need more graphics horsepower, you can opt for the
> 750-Ti card for about $150.
>
> I have a spare ATI card sitting on the shelf with a HDMI output.  If you
> live close to apex, you can stop by and borrow the card to see if that
> fixes your problem.
>
> -Ron
>
>
>
>
> On Feb 2, 2017, at 1:20 AM, Brian McCullough via TriLUG <trilug at trilug.org>
> wrote:
>
> I have been bothered for a while, ever since I bought and installed a
> new 32-inch HP monitor, because it only seems to do 1920x1080, rather
> than the native 2560x1440.
>
> I have been doing research tonight, and find that while X.0.log shows a
> lot of information about the card and all, it is very informative about
> the mode lines.  Incidentally, this is a Radeon Cedar-type board.
>
> At first, it shows a list of mode lines that include, and seem to
> prefer, 2560x1440, but then say that the HDMI output is active, and it
> will only deliver 1920x1080.
>
> Apparently, the DVI output is the desired one.
>
> OK, no problem.  I will get a DVI cable an attach that.
>
> Oops!   The card on the machine talks DVI, but this new monitor only has
> two HDMI connectors and a DisplayPort connector.
>
> OK, so back to the research.
>
>
> I find that if I want to plug a cable into my Apple laptop with a
> DisplayPort connector and then into my monitor with a DVI connector, no
> problem.  HOWEVER, I want the connection to go the other way.  Is this
> possible?  The research says: probably not.  EXCEPT that the maximum
> resolution that the adaptors that I have found is 1920x1080.
>
> NO improvement, even if the cable works the other way.
>
>
> More research.
>
>
> MAYBE I found an adapter that is designed for DVI on computer, DP on
> monitor.
>
> But, again, the maximum resolution is 1920x1080.
>
>
>
> SOoooo.  The final question is, is there such a thing as a DVI to DP
> adapter that will handle the native resolution of this monitor? Would a
> different video card improve the situation?
>
> Is there another solution altogether?
>
>
>
> Thank you,
> Brian
>
>
> --
> This message was sent to: Ron Kelley <rkelleyrtp at gmail.com>
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> --
> This message was sent to: Wes <wes at xitechusa.com>
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>