chrcoluk
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Re: DisplayPort/Monitor not always Detected
2015/10/25 03:50:48
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I managed to flash the new bios, sadly the issue still persists, I want to fix this as I noticed hdmi is causing ghosting in 30fps games and doesnt scale the pictore so well in non native resolutions.
I tried disabling DCI on my monitor, didnt fix, also tried changing monitor to displayport 1.1 from 1.2 which didnt fix.
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chrcoluk
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Re: DisplayPort/Monitor not always Detected
2015/10/25 05:27:30
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further update
if I am in the motherboard bios screen and power cycle the monitor, it still occurs, I have found no way to recover the screen other than a pc reboot in this instance.
I tested with another cable still occurs.
If I use my integrated graphics display port the issue does "not" occur.
have nvidia/evga been shipping faulty cards?
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woodzstack
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Re: DisplayPort/Monitor not always Detected
2015/10/25 22:28:58
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manuelg_nvidia
Can you all post what monitors are not being detected so we can investigate and also your exact graphics card and video BIOS version from the NVIDIA Control Panel please? Thank you.
HP LP3065 DVI and DP does not work. It works on my previous cards, which are 280 GTX 560GTX and 780 GTX as well as through a DP to DVI-D port it works on my 19 different laptops, half of which are Clevo's and the other 45% being Alienwares from M15X to AW18. Only the thee 900 cards from EVGA that I have this issue.
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sblantipodi
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Re: DisplayPort/Monitor not always Detected
2015/10/28 11:21:54
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woodzstack
HP LP3065 DVI and DP does not work. It works on my previous cards, which are 280 GTX 560GTX and 780 GTX as well as through a DP to DVI-D port it works on my 19 different laptops, half of which are Clevo's and the other 45% being Alienwares from M15X to AW18.
Only the thee 900 cards from EVGA that I have this issue.
I had problems with GTX980 and now I have similar problems with GTX980 Ti too. I don't think that is an Evga problems, most probably an nvidia one.
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jgdiaz
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Re: DisplayPort/Monitor not always Detected
2015/11/25 19:34:20
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manuelg_nvidia
Can you all post what monitors are not being detected so we can investigate and also your exact graphics card and video BIOS version from the NVIDIA Control Panel please? Thank you.
Manuel, I am having this exact issue and I am using an Asus MX99 widescreen monitor and an EVGA GTX 980 video card with bios version 84.4.31.0.81. Right now I am using the HDMI port since I just cannot get the DP working, but it worked fine for almost 2 months. I am also running Windows 7 x64 Professional. Thanks,
post edited by jgdiaz - 2015/11/25 19:40:15
Lian-Li V2000B Case, Asus Hero VII Mobo, EVGA GTX 980, Intel i7 4790k with Ultra Chill TEC Cooler, Windows 7 Professional 64Bit, EVGA 750 PSU, 16Gigs Patriot DDR3 1600 Memory, 500Gig Samsung Evo SSD, 4TB WD Green HDD, 2 TB Segate HDD
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sblantipodi
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Re: DisplayPort/Monitor not always Detected
2015/11/26 10:08:16
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jgdiaz
manuelg_nvidia
Can you all post what monitors are not being detected so we can investigate and also your exact graphics card and video BIOS version from the NVIDIA Control Panel please? Thank you.
Manuel, I am having this exact issue and I am using an Asus MX99 widescreen monitor and an EVGA GTX 980 video card with bios version 84.4.31.0.81. Right now I am using the HDMI port since I just cannot get the DP working, but it worked fine for almost 2 months. I am also running Windows 7 x64 Professional.
Thanks,
I switched to GTX980 Ti from GTX980 and hoped that the display port problems would be solved, nothing to do, maxwell don't wont to work ok with my Eizo Monitor when using DisplayPort.
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saharmali
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Re: DisplayPort/Monitor not always Detected
2015/12/05 06:40:03
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I've started threads about that exact same issue at the Nvidia forums and overclock.net. Seems almost everyone with the newest 4K monitors from Asus/Samsung that use displayport are having this issue. I can use my 980 with any other monitor I own over displayport and have no issues. I can swap the 980 for a 780 Ti, a different 780 Ti or a Titan and have no issues with the u28d590 over displayport. 
. 
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Grraarrgghh
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Re: DisplayPort/Monitor not always Detected
2015/12/07 13:33:11
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Yeah this an issue for a lot of people it seems.
Running:
1xReference Model EVGA GTX 980
1xEVGA Classified GTX 980
ASUS Z170-A Motherboard (latest bios)
i7-6700k OCd @ 4.7
16GB G.Skill PC4-25600 (3200mhz) RAM
Acer XB270HU 1440p G-Sync monitor
I had the Classified as the "big dog" card for a long time, and would often have to reboot once (sometimes twice or three times) to get the display to boot up. Last weekend, I accidentally put my PC to sleep instead of shutting it down, and I couldn't get the screen to wake up, no matter how many times I rebooted.
I swapped the SLI config to have the Reference as the primary card, and it worked! Except that after the first reboot, the Classified card would no longer register(!) and SLI could not be enabled. After trying many things (including DCing the PSU for 24 hours to fully discharge the computer), I found re-seating the Classified card (which is a huge PITA) would work, until I rebooted again.
Finally, when screwing around in my case, desperate to figure out how to fix this without having to wear out my PCI-E slots, I (sort-of) figured it out!
After shutdown, a green light on the top of the Classified card (which has no dissipation plate) stayed lit. Even after a 24 hour PSU discharge. How was this possible? Even though the DisplayPort cable was plugged into the Reference card, it was sharing power with the Classified card through the MB or the SLI Bridge (unsure which, likely the MB). When lit prior to a boot, the Classified card would not register at all.
So how to unlight it?
As I mentioned above, the solution is simply (every time) unplug the DisplayPort cable from the videocard after shutdown, and re-insert it. Unplugging the cable will cause the green indicator light to shut off, and it won't re-light after the DP cable is re-inserted until the next boot.
I am going to wear the hell out of my DP port, but this is the only way I have found to get both cards to recognize without fail every time. SLI runs perfectly fine after this is done.
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proxyissues
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Re: DisplayPort/Monitor not always Detected
2015/12/08 11:25:33
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LED on after 24h PSU discharge means it is powered by the CMOS battery and not discharging. You'd need a monster capacitor to keep an LED on for even 1 hour.
Monitor detection or non-detection can be cable or monitor. I had issues with an Asus monitor (4k) but a BenQ is rock solid on being properly detected on boot (or restore from sleep).
There would appear to be a connection issue between monitor and card because when you unplug the cable and reconnect the handshake restarts..
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Grraarrgghh
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Re: DisplayPort/Monitor not always Detected
2015/12/08 11:51:59
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Ah but here's the kicker, I even pulled the CMOS after the 24hr discharge.
The power source was definitely the DP cable (and I've tried two different DP cables).
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motoguy21
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Re: DisplayPort/Monitor not always Detected
2015/12/08 16:55:20
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I just began having this issue yesterday. I'm running a 4 monitor setup. The monitor with displayport is not being detected at all. I go to the NVIDIA control panel, try checking the displayport monitor that is unchecked, and my computer completely freezes. I have a EVGA GTX 970 FTW. I also tried a EVGA 980 FTW in the same computer.. same issue.. I'm back to running 3 monitors for now at 60htz. 
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proxyissues
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Re: DisplayPort/Monitor not always Detected
2015/12/09 09:25:22
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Cables don't have the capacitance to keep an LED running (orders of magnitude). Unless you have some exotic non-standard "Active" table that has some power source in it.
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proxyissues
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Re: DisplayPort/Monitor not always Detected
2015/12/09 09:35:02
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Is your cable listed on displayport.org? This link http://www.displayport.org/products-database/ Provides a tool for looking up cables. If it isn't on the list it isn't certified officially (they verified) and you will have no end of problems. Non-certified cables don't implement sleep correctly, and you can see other weirdness. I had a MiniDP -> Displayport cable that went funny after a month and would cause distortion and intermediate black screen flickerings. Key point: Certified cables off factory Day 1 years ago are fully capable of 4K @60Hz and there is no such thing as Display Port 1.0 1.1 1.2a cables. http://www.displayport.org/cables/how-to-choose-a-displayport-cable-and-not-get-a-bad-one/
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Grraarrgghh
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Re: DisplayPort/Monitor not always Detected
2015/12/09 20:23:07
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proxyissues
Is your cable listed on displayport.org?
This link
Provides a tool for looking up cables. If it isn't on the list it isn't certified officially (they verified) and you will have no end of problems. Non-certified cables don't implement sleep correctly, and you can see other weirdness.
I had a MiniDP -> Displayport cable that went funny after a month and would cause distortion and intermediate black screen flickerings.
Key point: Certified cables off factory Day 1 years ago are fully capable of 4K @60Hz and there is no such thing as Display Port 1.0 1.1 1.2a cables.
Interesting. The initial cable I used was the one that came with the Acer XB270HU, which it turns out is a BizLink E164571-KS (1m), and BizLink does not have a registered cable on that list, though the cable does bear the "official" DisplayPort stamp. Apparently BizLink provides cables for a lot of larger manufacturers, including Dell. The second cable is an Amazon special, a Rankie R-1104 2m cable. Guess I'll try ordering one of the "approved" cables and see if that makes any difference! EDIT: Looking at that list, they only have 8 approved DP Male to DP male cables? I kind of find that a bit weird... Also the GTX 980 isn't an approved displayport product. I have to believe that list is super out of date.
post edited by Grraarrgghh - 2015/12/09 20:49:19
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Pgcmoore
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Re: DisplayPort/Monitor not always Detected
2015/12/10 22:46:30
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proxyissues
Is your cable listed on displayport.org?
This link
http://www.displayport.org/products-database/
Provides a tool for looking up cables. If it isn't on the list it isn't certified officially (they verified) and you will have no end of problems. Non-certified cables don't implement sleep correctly, and you can see other weirdness.
I had a MiniDP -> Displayport cable that went funny after a month and would cause distortion and intermediate black screen flickerings.
Key point: Certified cables off factory Day 1 years ago are fully capable of 4K @60Hz and there is no such thing as Display Port 1.0 1.1 1.2a cables.
http://www.displayport.org/cables/how-to-choose-a-displayport-cable-and-not-get-a-bad-one/
Thanks for the info! Very Helpful 
"This program has performed an illegal operation and will be shut down"  My Affiliate Code is 05G-UGD-GZVU
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Grraarrgghh
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Re: DisplayPort/Monitor not always Detected
2015/12/11 18:37:32
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So I procured a StarTech.com DP approved DP cable, and the "light staying on issue" has indeed disappeared! I haven't tried swapping the Classified card back to the primary slot, but so far everything is loading up without issue, and both cards are always detected.
Helpful tip!
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proxyissues
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Re: DisplayPort/Monitor not always Detected
2015/12/15 10:45:07
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Grraarrgghh
So I procured a StarTech.com DP approved DP cable, and the "light staying on issue" has indeed disappeared! I haven't tried swapping the Classified card back to the primary slot, but so far everything is loading up without issue, and both cards are always detected.
Helpful tip!
As it should.. And incase anyone is wondering, no that list isn't out of date they do seem to keep it up to date. The problem is there actually is NOT that many cables properly certified. I suspect this has to do with licensing the logo VS getting certified. The insane thing is that a 10' certified cable from Amazon does not cost more than a *high* quality uncertified cable. Especially when you see that the creators of the spec tell you that retailers are basically ripping you off.
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Monkey Wrench
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Re: DisplayPort/Monitor not always Detected
2016/05/20 10:30:09
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Old thread but have encountered this issue myself the last few days and tried everything suggested here with no luck even with the latest drivers. I then found a setting in my Samsung monitors for 'displayport version' it was set to 1.1 and I changed it to 1.2 and now everything seems to be working (for now).
Though it worth mentioning.
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davebrewster
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Re: DisplayPort/Monitor not always Detected
2016/05/20 14:57:05
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Hi U'All. SomeBody throw me a bone here. I installed a new motherboard, as Windows was crashing . I have a single TiTanZ / AW x99 build / i7 5930. BenQ 3200 monitor.
At the moment I am forced to use my HDMI connection, as the DP connection reports no
signal. The cables are detected however as they do appear in system setup controls.
Choosing DP results in the no signal detected message.
It was working.. prior to the MotherBoard/memory (32gddr4) changeout.
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davebrewster
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Re: DisplayPort/Monitor not always Detected
2016/05/20 15:43:33
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Monkey Wrench
Old thread but have encountered this issue myself the last few days and tried everything suggested here with no luck even with the latest drivers. I then found a setting in my Samsung monitors for 'displayport version' it was set to 1.1 and I changed it to 1.2 and now everything seems to be working (for now).
Though it worth mentioning.
Where did u find the setting for the monitors display port vers? [ NM.. I got it..] still DP 'no signal detected'.
post edited by davebrewster - 2016/05/20 16:32:32
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Monkey Wrench
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Re: DisplayPort/Monitor not always Detected
2016/05/22 15:50:59
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Staring me in the face actually. 'Menu' button > Select 'Menu' > 'Settings' > 'DisplayPort Ver.'
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bcavnaugh
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Re: DisplayPort/Monitor not always Detected
2016/05/22 15:55:25
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Turning Off and On the Monitor will now work, you must remove the power from the Monitor.
Unplug the Power Cable on the Monitor wait a few seconds and then plug it back in.
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davebrewster
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Re: DisplayPort/Monitor not always Detected
2016/05/27 19:42:49
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bcavnaugh
Turning Off and On the Monitor will now work, you must remove the power from the Monitor.
Unplug the Power Cable on the Monitor wait a few seconds and then plug it back in.
Didn't help.
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dukester34
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Re: DisplayPort/Monitor not always Detected
2016/06/19 08:26:00
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I have an ACER predator z35 and a titan card. my display port works fine on the cable that came with monitor. it is to short for me though and runs across desk. I ordered new one and 6ft and plugged it in and no signal detected. sent for new cable same thing.
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arestavo
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Re: DisplayPort/Monitor not always Detected
2016/06/19 09:54:59
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If it works with the original cable but not other cables, then the other cables are the culprit.
Get a different brand and make sure that they are rated the same as the original.
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Mower
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Re: DisplayPort/Monitor not always Detected
2017/01/06 13:33:43
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My brothers: was or is there in fact a fix for this now?
Windoze 10 Pro 8600K on an ASUS Hero MOBO 32 GB GSkill 3200 speed ram EVGA 1070 GTX 8GB. 2x 27" widescreens Saitek x65/Saitek rudders TIR 4
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Mower
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Re: DisplayPort/Monitor not always Detected
2017/01/06 13:55:54
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This fixed it fo rme: I have the same problem. It's not the port or cable as it works during boot. It is Windows drivers not properly recognizing displayports!. I found this solution elsewhere. Give it a try: Description of Solution: It is honestly as if the driver install the first time happens incorrectly and then it doesn't do plug n play correctly thereafter. So I tell device manager to show me nonpresent devices and then i uninstall them. The next time it connects it will redo the plug and play. Solution that worked for me: - Click Start > Run.
- Type cmd and press Enter.
- At the command prompt, run this command: Note: In Windows 2008 and Windows 7, open the command prompt using the Run as Administrator option.
set devmgr_show_nonpresent_devices=1 Note: If this command does not work (a possibility in Windows Server 2000 and 2003), you may need to add the parameter to Windows and set its value:- Right-click the My Computer desktop icon and choose Properties.
- Click the Advanced tab and select Environment Variables.
- In the System variables section, click New.
- Set the Variable name to devmgr_show_nonpresent_devices and set the Variable value to 1 to enable the parameter.
- Click OK to add the variable to Windows.
- Start the Device Manager by running this command from the same command prompt:
start devmgmt.msc - Click View > Show Hidden Devices.
- Expand the Monitors tree (click the plus sign next to the Monitors entry).
- Right-click the dimmed Monitors, then click Uninstall.
- Once all of the grayed out Monitors are uninstalled, reconnect your monitor.
From here last page: http://forums.evga.com/Di...-Working-m1964245.aspx
Windoze 10 Pro 8600K on an ASUS Hero MOBO 32 GB GSkill 3200 speed ram EVGA 1070 GTX 8GB. 2x 27" widescreens Saitek x65/Saitek rudders TIR 4
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