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January 28th, 2025 21:53
XPS 8950, DisplayPort++, no signal to various monitors
XPS 8950
Originally I had my XPS 8950 pc connected to an older Dell Monitor using a DP to DVI adapter plugged into the DP++ port working fine. I decided to switch to a larger Samsung Monitor using the same cable setup and couldn't receive a signal to the monitor. The I decided to switch back to the DELL monitor that initially worked and to my surprise couldn't get to no longer work. Thus began my painstaking journey down troubleshooting lane.
Thus far I have tried a combination of different DP to DVI Adapters with different DVI cables to many different monitors other than those I indicated above. I tried connecting to an HP monitor as well as another model of Dell Monitors and got the same problem. The HP monitor had a DP input port so I ran a direct DP Passive Cable to my DP++ port on my PC and still didn't get a signal. I tried using a different DP Passive Cables and still no change. I have a Samsung laptop with a docking station that has DP port. So to make sure there wasn't an issue with the cables, I connect the DP Passive cable s to those monitors successfully. I also was able to successfully connect to those monitors using the DP-DVI adapter with the DVI cable connector setup.
My next set of troubleshooting steps were to visit Dell's website to search for solutions. I first ran diagnostics and everything passed. I searched for updates that could have something to do with the issue and didn't find anything that would have resolved this particular issue. I then spent a considerable amount of time searching through the community forum for similar problems and didn't come up with any answers.
Now I'm reaching to the community to see if anybody can think of anything else I may try. Newer cables? Different DP++ adapters to HDMI or VGA? I'm at a loss so if anyone could help I would appreciate it. Running Windows 11.
For some more context and info, I was able to successfully connect to those monitors by using one of the DP ports on the separate video card that came with the machine . The graphics card is a NVIDIA GeForce RTX 3060 Ti.
Can someone also make clear if the DP++ port on this machine is an Onboard port? I'm confused on how this port is represented in the System Information or Device Manager settings in Windows. I
Sorry for the small novel. LOL . Let me thank you in advance for any assistance you can provide.
Danny
dsaldivar
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January 29th, 2025 12:42
@RoHe Thank you Ron for taking your time to answer my post and for your suggestions.
To answer your question, yes I did check the OSD setting and switched it to use the port directly and not use auto-detect.
I guess I didn't understand what benefits dp++ has over using a standard dp. I assumed that dp++ provided some more functional or feature benefits in communicating with newer models of monitors, like speed of signal or utilization of the newer technology features.
Does dp++ only afford you more flexibility in connectivity to legacy monitors without adding expensive adapters? Does the dp++ port provide any more connectivity value when connecting to two monitors? If not for any functional and feature purposes , I don't know why PC manufacturers design this port as an onboard option with little or to no more value considering it uses more of the Pc's resources.
Anyway, I'm going to proceed with your suggestion on using the PCI video card ports.
Thank you so much again for giving me some insight and clarification on this matter. I really appreciate your time.
Sincerely,
Danny
RoHe
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January 28th, 2025 23:42
Have you checked the monitor's own On-Screen Display (OSD) to make sure it's set to detect the right type of signal? If monitor has an "auto-detect" option for the video source, change it to use the specific input you're connecting to it , eg DVI. You need an active DP++ cable to connect onboard DP++ to DVI(monitor).
If you have an add-in NVidia card, why are you trying to use the onboard Intel Graphics DP++ port? Onboard Intel Graphics runs on the CPU chip and uses system RAM, so that can impact PC's performance.
Connect all your monitors to the add-in card, even if you need an adapter, eg HDMI(NVidia)>DVI(monitor).
If necessary, you could connect one of your monitors from onboard DP++ using a passive cable to monitor's HDMI port. DP++ should automatically detect an HDMI monitor over a passive cable And make sure monitor's OSD is set use HDMI input, rather than "auto-detect".
RoHe
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January 29th, 2025 19:25
You're welcome...
For starters, Intel designs CPU chips with onboard graphics, so OEMs support them. With onboard Intel Graphics, users don't need to have an add-in video card which helps keeps the PC's price down. And, if an add-in video card ever fails, the user can immediately switch over to using the onboard port until a new video card is installed.
DP++ has advantages over DP. DP++ automatically recognizes an HDMI or DVI monitor when using a passive DP++>HDMI or >DVI cable. That also helps keep costs down because there's no need for both onboard Intel DP and HDMI ports or to buy a more expensive active cables.
DP++ also supports daisy chaining so, with monitors supporting that technology, you only need one port to support multiple monitors.
Add-in video cards have the advantage because they have their own processor and fast video RAM on them, so they use less CPU time and less system RAM. They may also support higher resolution than onboard Intel Graphics. And add-in cards typically have a variety of output ports to connect monitors with different inputs using only passive cables.
FWIW, some Intel chips with the "F" at the end of their name, don't support any onboard graphics so they are cheaper, and the PC won't have any onboard ports. But it's all about providing choices for the user.
(edited)