[TriLUG] Display adapter and cable to monitor

[Wes Garrison via TriLUG]

"I had an analogous problem..."

Surely you mean a digital problem?

Brian, if you can't use DisplayPort on both ends, you need to either plug
in 2 HDMI if your adapter has 2 or 1 HDMI and 1 DVI->HDMI cable the same
monitor.

I have a handful of DVI->HDMI cables laying around, if you need one.
Intrex also sells them cheap.

DVI and HDMI (older versions) are signal compatible.  DisplayPort is a
different animal entirely.  There are "active" adapters that convert
DisplayPort to other protocols (VGA, Dual-Link DVI, etc.)  but I've never
seen anything that goes *from* the older protocols to DisplayPort.

-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 11:24 AM, Roger W. Broseus via TriLUG <
trilug at trilug.org> wrote:

> Try tech support for the monitor. I had an analogous problem with a new
> Samsung monitor and it also turned out to be a cable problem that I would
> never have solved on my own. Oh, I think maybe it was tech support for the
> video board.
>
> Sometimes it's worth going directly to "the source" for tech support
> problems.
>
> --
> Roger W. Broseus - Linux User
>     Email: RogerB at bronord.com
>     Web Site: www.bronord.com
>
>
> On 02/02/2017 01:20 AM, Brian McCullough via TriLUG 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
>>
>>
>>
> --
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