displayport interview questions
Top displayport frequently asked interview questions
Does DisplayPort carry sound as HDMI does?
Specifically, I am looking at Lenovo Laptops T410 or T510.
I'm wondering if the spec permits for audio over DP and if possible if the Lenovo laptops I mentioped implement it.
Source: (StackOverflow)
TB-to-TB cables seems to be more expensive than mDP-to-mDP cables.
Is there any actual difference besides the branding?
This is for use in connecting a MacBook Pro to a dock with multiple ports (USB 3.0, FireWire, Ethernet, Audio, etc.)
Source: (StackOverflow)
I've read that DisplayPort supports multiple monitors. My question is how can I connect 3 monitors with one display port, is there such a splitter? I have 2 DVI monitors and one VGA (which I could use DVI to VGA convereter)
If I could do it, will I be limitted by the GPU? Is it possible that my GPU only allow for 2 monitors?
Source: (StackOverflow)
What kind of cable/connector is this? It looks like an HDMI connector, with very similar pins, but it has a slanted edge on only one side and the other side is square.
Source: (StackOverflow)
As the title suggests I want to power two 2560 x 1440 monitors from one graphics card.
I am just about to send my second graphics card back to Amazon, so before I purchase a 3rd incorrect card I thought I should get some advice.
My latest card has dual DL-DVI output but only supports 2560 x 1440 on one output, the other maxes out at 1920 x 1080.
Can graphics cards with two Dual Link DVI adapters (or alternately, one Dual Link DVI and one DisplayPort support the a full 2560 x 1440 on both monitors, or does that depend on the graphics hardware and not only the connectors?
Source: (StackOverflow)
I have the motherboard "Gigabyte Z77x-ud3h" with a 3rd Gen Intel CPU with HD4000 graphics. I am using Ubuntu 12.10.
When I connect one monitor (Dell 3011) with DisplayPort and a second monitor (Iyama) with HDMI, after a while the Dell goes into power saving mode.
When I connect just the Dell monitor (DisplayPort), it works, and also when Dell is connected by DVI, but then I don't get full resolution.
Why does the HDMI monitor go to sleep after a while when another monitor is simultaneously connected with DisplayPort?
Source: (StackOverflow)
I want to buy a 30" monitor to go with my new MacBook pro, but the 30" monitor in the Apple store seems to use a dual link DVI connection (which requires a $100 adapter).
Are there any 30" monitors that use mini DisplayPort?
Source: (StackOverflow)
I am planning to use Surface Pro 2 with a dock station as my main computer and I would like to connect two external monitors to it, but the dock station only contains a single DisplayPort socket. However, I see that DisplayPort 1.2 specification, approved in 2009, allows for daisy-chaining monitors through its Multi-Stream Transport feature.
How do I tell if I will be able to use two monitors in daisy-chain mode with my computer?
Source: (StackOverflow)
Well, I just wanted this yes/no simple question to Dell e-mail support. Their web site required service code just to send an e-mail. Then I tried their "technical" chat support. Some Indian person responded weirdly and finally answered that he/she did not have technical knowledge and just gave me the link to the e-mail support (which I tried already).
I have a Dell U2412M monitor which has a DisplayPort and an up-link USB port. I have enabled DDC/CI in the OSD. I am using Windows 8, and the brightness control on the Charm Bar is disabled.
Is it possible to enable it? Because I heard that DDC/CI lets your computer control your display.
DDC/CI (Command Interface) standard was introduced in August 1998. It specifies a means for a computer to send commands to the monitor, as well as receive sensor data from the monitor, over a bidirectional link. Specific commands to control monitors are defined in a separate Monitor Control Command Set (MCCS) standard version 1.0, released in September 1998.
DDC/CI monitors are sometimes supplied with an external color sensor to allow automatic calibration of the monitor's color balance. Some tilting DDC/CI monitors support an auto-pivot function, where a rotation sensor in the monitor enables the operating system to keep the display upright as the monitor is moved between its portrait and landscape positions.
Most DDC/CI monitors support only a small subset of MCCS commands and some have undocumented commands. Many manufacturers did not pay attention to DDC/CI in the past, but now almost all monitors support such general MCCS commands as brightness and contrast management.
Source: (StackOverflow)
I am the proud new owner of a MacBook Pro with a mini-DisplayPort. My desk setup used to allow me to position the screen of my old MacBook beside an external monitor, essentially allowing dual-head. It was also advantageous that my old MBP and my external monitor had the same resolution, 1440x900.
Now, I'm searching for a set of two monitors that I can use a HengeDock with. Unfortunately, the MacBook Pro suffers from having only one mini-DisplayPort.
Looking up the spec for DisplayPort 1.2 (which the MBP supports), DisplayPort daisy chaining is supported. What I'm looking for is a monitor that has two DisplayPorts so I can daisy chain two monitors off the single mini-DisplayPort.
What I don't want is a USB-based video solution. I need full acceleration on both monitors; an external video card won't cut it. I hope I don't have to wait a few years for these monitors to come out.
TL;DR: I need two monitors with two DisplayPorts each that I can daisy-chain.
Thanks!
Source: (StackOverflow)
Recently, I built my first computer:
After confirming the computer boots/POSTs fine, I attempted to install Windows 8 Dev Preview, x64 via USB, and it was extremely slow (i.e. taking many, many hours to install). I tried a number of things, eventually taking out all but 1 stick of RAM, and Windows Setup proceeded much faster - however, when Windows went to logon, the screen starts to fuzz/zig zag*, it only happens when the resolution is above 800 x 600 resolution; the monitor is set to use 1024 x 768 pixels. I first used the drivers from the CD, then went and downloaded AMD's latest drivers specifically for Windows 8. Nothing helped, not even uninstalling completely and then reinstalling the drivers.
Next, I decide to install Windows 7 Home Premium on a different partition. Same scenario with the RAM, had to take out all but one stick. Installed quickly with no issues, I even booted into Windows with no fuzzing/zig zagging issues, but couldn't use Aero, since there were no drivers installed for the graphics card - so I downloaded the latest drivers for Windows 7 x64 and rebooted, and got the exact same problem, the fuzzing/zig zagging.
I've tried all kinds of things, from installing all the latest updates in Windows (including SP1), unplugging different devices (such as the IDE DVD/CD drive), double-checking the GPU PSU connection, etc.
My question: Why is this happening at resolutions higher than 800 x 600 and what can I do about it?
*By fuzzing/zig zagging, I mean this, but vertical, and you can still see the image the entire time, it just blurs/fuzzes quickly, and then clears, and then fuzzes again.
Update (12-29): I swapped out my Corsair 400w PSU for a Corsair 650w, and when I boot Windows 7, the fuzzing/zig zagging is still present.I'm suspicious of my DisplayPort -> VGA adapter, should I try a DVI -> VGA?
Message received from XFX Support:
Why are you using Displayport to VGA adapters? A DVI to VGA adapter is much more natural since it isn`t really adapting anything. I think that the fuzziness is being cause by the adapter that you are using. Most 6770s ship with one DVI to VGA adapter. The power supply that you are using is fine for this card and that computer. Thank you.
Is this true, that a DVI -> VGA is more natural? Should I try a DVI -> VGA next?
Source: (StackOverflow)
In my search for a new display, I came across the Dell Multi-Monitor Hub MMH11, which seemed to be an alternative to my search for daisy-chainable DisplayPort displays.
However, before I cave and spend $179 on this device, I am wondering if this will be similar to other splitting devices where it appears to the computer as one big monitor and the device does the splitting (which I don't want). Or, does this use the packet-based nature of DisplayPort to present two/three separate displays to the computer?
Also, would this device work on my MacBook Pro? (I know the Dell site says it's for Windows, but it also says that no driver installation is required. I'd assume since the MBP supports DP 1.2 it would work, but it's better to ask). Thanks!
Edit: I've checked out the similar-looking Cirago DisplayPort splitter, but I have extreme doubts as to whether or not it's a genuine displayport splitter, or just another monitor-conglomerate. Their DVI solution looks identical to Dell's, which I'm pretty sure won't do what I want. I also don't want to order this DisplayPort "hub" and find that it doesn't do what I want it to.
Source: (StackOverflow)
Newer Radeon video cards come with four ports standard:
- DVI (x2)
- HDMI
- DisplayPort
If I want to run three 24" monitors, all of which are DVI only, from this video card -- is it possible to convert either the HDMI or DisplayPort to DVI? If so, how? And which one is easier/cheaper to convert?
I did a little research and it looks like there isn't a simple "dongle" method. I found this DisplayPort to DVI-D Dual Link Adapter but it's $120; almost cheaper to buy a new monitor that supports HDMI or DisplayPort inputs at that point!
There's also a HDMI to DVI-D adapter at Monoprice but I'm not sure it will work, either.
AnandTech seems to imply that you do need the DisplayPort-to-DVI:
The only catch to this specific port layout is that the card still only has enough TMDS transmitters for two ports. So you can use 2x DVI or 1x DVI + HDMI, but not 2x DVI + HDMI. For 3 DVI-derived ports, you will need an active DisplayPort-to-DVI adapter.
Source: (StackOverflow)
I have 2 monitors connected to a NVIDIA GeForce GTX 660:
- Left is 1920x1080 via DVI (Samsung SyncMaster 2443BW)
- Right is 2560x1440 via DisplayPort and is set to Primary (Samsung SyncMaster SA850)
I often leave my computer running overnight (working on long render job, doing backups, etc) so I only power off my monitors manually. However, if I power off the primary monitor, it is disabled completely as if it were unplugged from the graphics card (i.e. icons are moved, open apps are moved and resized to fit on the new primary monitor). If I switch from DP to a DVI cable, this does not occur. It seems to be an issue when using DisplayPort.
Is there a way to disable the monitor from being disabled completely in Windows when I power it off physically?
I have found no relevant settings in either Windows Display settings, nor the NVIDIA control panel software.
Edit #1: I'm using an Oehlbach Transdata DP 510 cable.
Edit #2: Here is a screenshot of my NVIDIA Control Panel v7.2.710.0: 
Edit #3: Here are screenshots of my Monitor configuration:
Clicking on Advanced settings reveals a Generic PnP monitor running at 59 Hz? 60 Hz is the only other option available.
Here is my secondary monitor which is connected via DVI:
Edit #4: If I open the "Screen Resolution" configuration panel and power the monitor off (via the power switch), this is what is shown:
It looks like I disconnected the monitor from the video card.
Source: (StackOverflow)