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Old 09-08-2012, 04:21 PM   #1
terrie
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Default Display Port???

Anyone know anything about using Display Port for monitor to computer system connections?

My new Asus PA248Q came with a Display Port cable and a DVI cable (and a VGA cable too). I had read the DP is the one to use so I plugged it into the appropriate monitor outlet and plugged the other end into the DP port on the video card in my new system and basically, it's a no-go. I get a "no vga" found and then nothing happens--boot does not proceed which was real fun when I turned on the pc for the first time.

If I unplug the DP cable and plug in the DVI cable, the pc boots just fine. I don't know if I can plug in BOTH the DP cable AND the DVI cable and then use the OSD on the monitor to select the DP as the primary.

I have this query into Asus tech support but while I'm waiting I thought I'd see if anyone has any suggestions...

Thanks!

Terrie
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Old 09-09-2012, 11:06 AM   #2
Steve Rindsberg
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Know anything? Innocent!

This might be useful though:
http://www.displayport.org/faq/

I wonder if you need to set something in the BIOS to tell the PC where to look.

   
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Old 09-09-2012, 12:02 PM   #3
terrie
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Thanks for that link. I found this:

"Q: When I hook up my new 24 in Dell monitor to the computer through the DisplayPort cable it will not activate my monitor. What am I doing wrong?

A: You need to manually select the DisplayPort input in the monitor’s On Screen Display (OSD) with this model."



The problem is that I can't access the OSD until my system boots and of course since I have 2 users, I can't complete the boot process without seeing what's on the screen which doesn't display...'-}}

When I use the dvi cable, it takes a few seconds to complete the connection--I've been turning the screen off when I shut down and am rethinking that--so I'm wondering if maybe I didn't wait long enough for the DP signal to complete.

What I don't know is if I can plug in both DP and DVI cables which is what I've asked Asus tech support--I can't figure out how to word the search to see if I could find the answer myself...


>>I wonder if you need to set something in the BIOS to tell the PC where to look.

I've got one of those new BIOS interfaces and guess what...it doesn't recognize a usb keyboard so I had to shut down and use one of those usb-to-ps2 jobbers to plug the keyboard into the ps2 port. I needed to go in and shut off that stupid @#$(*)@!!!! numlock key--why the hell is that always set to enabled???! While in the BIOS, I did look around for something to do with DP but I couldn't find anything...

Thanks...

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Old 09-09-2012, 08:14 PM   #4
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>> The problem is that I can't access the OSD until my system boots

??? This'd be the on-screen display of the monitor itself; that should be accessible no matter what. Computer connected or not, just so long's the monitor's on.

>>I wonder if you need to set something in the BIOS to tell the PC where to look.

>> I've got one of those new BIOS interfaces and guess what...it doesn't recognize a usb keyboard so I had to shut down and use one of those usb-to-ps2 jobbers to plug the keyboard into the ps2 port. I needed to go in and shut off that stupid @#$(*)@!!!! numlock key--why the hell is that always set to enabled???! While in the BIOS, I did look around for something to do with DP but I couldn't find anything...

Recognizing the USB keyboard or not might itself be a bios setting. I doubt the bios would have anything to do with the DP port per se, but it might have settings to select which monitors are enabled by default.

   
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Old 09-09-2012, 09:34 PM   #5
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Quote:
steve: ??? This'd be the on-screen display of the monitor itself; that should be accessible no matter what. Computer connected or not, just so long's the monitor's on.
It's not...it's been so long since I used the OSD on my Nec that I couldn't remember if it worked without my system being booted and so I wasn't sure if I were remembering correctly. Guess I was.

I didn't want to break anything by using both the DP and the DVI cables so I unplugged the DVI cable and plugged the DP cable back in, turned everything on and waited (because I thought perhaps I'd not waited long enough when I tried the DP cable before) and it was a no-go and no OSD either.

Turned off the pc, unplugged the DP cable, plugged the DVI cable back in, booted which worked, pushed the menu button the monitor, navigated to the input selection, selected DP and...no screen because of course there was no DP cable plugged in. Turned off the system, turned off the monitor, turned everything back on and it recognized the DP cable--is it just me or...is this a stupid design...'-}}

I suspect that the way one is supposed to do it is to plug in both the DVI and DP cables, then select the DP via OSD and then you can unplug the DVI after you've shut the system down but I didn't want to take the chance that just because I think that's the logical approach that Asus thinks so too. I should hear back from Asus tech support tomorrow so I'll report back on what they say...



>>Recognizing the USB keyboard or not might itself be a bios setting.

No...it's apparently a common issue with this new bios approach with some usb keyboard being seen and others not. Since I don't go into the bios that often, it's not worth buying a keyboard that's recognized when it's just a matter of putting the ps/2 adapter on to plug the keyboard into the ps/2 port when I need to access the bios. I am going to mention it to the shop though...



>>I doubt the bios would have anything to do with the DP port per se, but it might have settings to select which monitors are enabled by default.

Yeah...I think you're right. I wanted to use the DP port because I've read it's "better" and...because I may decide to use my Nec as a second monitor and I need that DVI port for that--video card has 1 DP port and 1 DVI port...

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Old 09-10-2012, 07:18 AM   #6
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>> It's not...it's been so long since I used the OSD on my Nec that I couldn't remember if it worked without my system being booted and so I wasn't sure if I were remembering correctly. Guess I was.

That's too weird for words. But it is, as they say, what it is, I guess.

   
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Old 09-10-2012, 01:47 PM   #7
terrie
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Quote:
steve: That's too weird for words. But it is, as they say, what it is, I guess.
Indeed...I've not heard back from Asus tech support but supposedly they have a 48hour clock running and my query will be bumped up in priority after 48hours. The question is does the clock run on the weekends or does it start ticking only during the business week--I sent my query in on Saturday so I'll give it another day or so before I try it again...

I'll keep you posted...

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