57
votes
Accepted
USB ports in LG27UD88-W computer display not working
Your understanding is incorrect. There is a USB hub in your monitor, no different than an external USB hub. You need to connect a USB cable from your computer to the USB in port on your monitor and ...
- 73.6k
52
votes
Why is remote desktop very slow when host monitor is off unless HDMI cable is used?
You say:
“This can be avoided if I use an HDMI cable alongside the DisplayPort cable going into the same monitor, but it's a very weird solution and I'd rather find a different fix.”
Then you need ...
- 56.1k
37
votes
USB ports in LG27UD88-W computer display not working
The LG27UD88 monitor is indeed a piece of confusing engineering. You have too many options.
If your video card does not have the Type-C output and you are using DisplayPort, the DP link does not have ...
- 12.9k
30
votes
Accepted
What is the technical reason for modern graphics cards only supporting four monitors?
Generally even a protocol such as DisplayPort requires some kind of transceiver electronics that are completely distinct from the other buses. The way a graphics card talks to a monitor over HDMI or ...
- 93.8k
26
votes
Accepted
Can't convert HDMI to DisplayPort - root cause?
HDMI is a clock-less video format, DP uses a clock to keep video in sync.
DP adds the clock to the video at the sending device; so a DP-receiving device needs to see a clock on the incoming video, ...
- 300
25
votes
Accepted
What's up with HDMI and DisplayPort over USB C?
The Wikipedia article on USB-C has a "Alternate Mode protocol support matrix for USB 3.1 Type-C cables, adapter cables and adapters" which indeed shows HDMI 2.0b support for every Alternate ...
- 3,923
17
votes
Can't convert HDMI to DisplayPort - root cause?
HDMI and DisplayPort are completely different from the point of view of the signals that they send down the wires, as well as the connectors that they use. However, a DisplayPort output has the ...
- 171
16
votes
USB ports in LG27UD88-W computer display not working
From LG's website "The USB port on the product functions as a USB hub.
Please connect the USB C-C or USB C-A cable to the PC"
You will have to connect this cable before those ports will work as a hub!...
- 308
15
votes
Accepted
What does it mean for a monitor to have a "DisplayPort out" connector?
This feature allows you to chain multiple Display Port Devices together. DisplayPort v1.2 allows daisy chainable displays to have both a DisplayPort input and a DisplayPort output. This includes ...
- 73.6k
13
votes
External Monitor shows "1|6" and my laptop display is "5" – what is this?
I think I have solved it by removing Hyper-V (came default with Win10 Pro).
I'm running windows 10 on a Lenovo T540p laptop and had as many as 7 displays showing up at one time. I ended up removing ...
- 138
12
votes
Accepted
DisplayPort downstream limited to 1920×1080
This is a limitation with USB-C and DisplayPort versions and, sometimes, dumb monitors.
DisplayPort Alt Mode on USB-C is typically configured to provide two DisplayPort lanes. This allows a USB 3 ...
- 63.9k
9
votes
Accepted
External Monitor shows "1|6" and my laptop display is "5" – what is this?
I also had this exact problem. It is for sure related to the Intel drivers. I have a Dell M3800 and went and downloaded the drivers from Dell (they are much older) but it worked. I made sure to ...
- 106
9
votes
Does DisplayPort 1.2 support HDR?
No it does not, not sure what those manufacturers are trying to say in the specs. But it is clear 1.2 does not support HDR.
Both models also says this:
"The HDR Effect helps transform non-HDR ...
- 58.4k
8
votes
Accepted
Why do do HDMI to DisplayPort adapters come with a USB charging cable?
Because while Displayport transmitters, as built into a graphics card, are capable of "falling back" to HDMI mode the same cannot be said about HDMI ports "upgrading" to ...
- 93.8k
7
votes
Disable audio output to DisplayPort device
Same problem with Sierra and a Dell P2715Q, here. It seems like a display with no audio shouldn't trigger this, but ¯\_(ツ)_/¯
With the display connected and no headphones, I used the Sound ...
- 171
7
votes
Accepted
HDMI to DisplayPort adapter
Setup = Laptop HDMI out --> HDMI to HDMI cable --> HDMI to DP adapter --> Monitor DP in = Doesn't Work!
The computer HDMI cannot send a signal to a monitor DP. Computer DP can always send a signal to ...
- 695
7
votes
Accepted
Does G-Sync work through a docking station?
No, it doesn't work.
I tried this with my Alienware 13r3, Acer Predator XB241H and a CalDigit TS3 Lite.
144hz 1080p is no problem, but it's impossible to get G-Sync to work through the Dock.
G-Sync ...
- 86
6
votes
Do I need to do something special to get DDC/CI to work over DisplayPort?
On Linux, the first order answer is that it should just work. The I2C signals are carried over the DisplayPort AUX channel, and the video driver should make this transparent.
ddccontrol can be ...
5
votes
Is it possible to enable software brightness control on Dell U2412M
It is possible to control firmware settings and configuration of monitors that support DDC/CI.
Dell provides a custom-branded software by the name of Dell Display Manager, designed by EnTech Taiwan, ...
5
votes
What does it mean for a monitor to have a "DisplayPort out" connector?
DisplayPort allows displays to daisy-chained together in series rather than needing each display to be connected directly the computer itself.
In theory this can allow for simpler cabling in multi ...
- 93.8k
5
votes
Accepted
DisplayPort over USB-C resolutions
DisplayPort over USB-C often does not have the required bandwidth for more than two 1080p screens. This mainly depends on two factors: DisplayPort version and link configuration (number of DisplayPort ...
- 63.9k
5
votes
Accepted
Can DisplayPort MST be combined with USB-C to use two monitors over one USB-C connector
With DisplayPort over USB-C, there is an important limitation to be aware of. Unlike with Thunderbolt, the USB and DisplayPort signals are not muxed and each requires dedicated wires. This means the ...
- 63.9k
5
votes
Accepted
3 monitors with closed laptop on Lenovo T490 and 2nd gen usb c dock
Technical Documents are the Gold Standard
If you want to get information you can rely on, you should rely on verified documentation.
Starting with the ThinkPad_T490 specifications refferenced in your ...
- 3,174
4
votes
Can't get full 60Hz at native 3840x2160 resolution?
Turns out the ASUS PA328Q treats its DisplayPort interfaces as DisplayPort 1.1 by default, and instead of detecting DisplayPort 1.2 support on the other end (if that's possible) it exposes the ...
- 1,513
4
votes
Why DisplayPort, HDMI port etc. while USB can do the job?
The profusion of interfaces largely comes down to the timing of developments.
USB, as its name says, is a universal interface and was developed to allow the interchange of multiple types of digital ...
- 17.7k
4
votes
Accepted
How to connect portable monitor USB Type-C to graphic card with display port or hdmi
Besides video signal, also power should be delivered through that USB cable, so I'm afraid it won't be so easy.
Official site of ASUS lists only a few devices and motherboards being compatible with ...
- 21.6k
4
votes
Turning DisplayPort monitor off disables monitor completely
I have the option to disable DisplayPort 1.2 on my Monitor's OSD. This resolved the issue for me.
- 203
4
votes
DisplayPort Link Failure after monitor sleep?
thanks for this thread - it has helped me debug my own problem.
I have come across some "misc Chinese industrial" monitor with DP input, that behaved in this way - and, based on available information,...
- 293
4
votes
Accepted
Why are my two chained monitors just mirrored and not detectable?
In order for the daisy-chaining to work correctly, it needs to use DisplayPort 1.2.
I think that your U2414H monitor "does" support DisplayPort 1.2. But, as it seems from several forum posts all over,...
- 11.3k
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