[???] use USB C monitor without USB C?

joevt

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I read through this thread but still couldn't find a solution for the issue i'm facing (perhaps there was but i am not fully understanding some USB-C tech situations)

I have a xiaomi mi notebook pro (16GB, i7 version) and i bought the Asus MB169C+. The notebook pro has 2 USB-C ports, however only 1 can be used to charge the device (PD). If i plug the asus screen into that port it works but i cannot charge my laptop at the same time. I also tried the official xiaomi USB hub that has multiple USB-C connectors but it would only let me charge the laptop through it, not plug the screen in as well.

Before i try selling it on ebay, is there any other possible way I can get the screen working + charge my laptop at the same time? Perhaps using some adapter for a workaround

I'm now looking at USB-A portable screens so it will free up the power delivery USB-C on my notebook pro - https://www.asus.com/uk/Monitors/MB16AC/
There are a few options:

1) You need a USB-C dock with power deliver plus USB-C with DisplayPort alt mode output. The HP Thunderbolt Dock G2 will do that (it works with computers that have USB-C with or without Thunderbolt - it has up to 100W of Power Delivery). There may be other similar docks.

2) The Wacom Link Plus can take video from the laptop's HDMI port and convert it to USB-C with DisplayPort alt mode, leaving your USB-C port free for charging. I didn't have much luck with the HDMI input of the Wacom Link Plus, but maybe it could work for you.

3) There exist USB-C to DisplayPort output adapters with 60W of Power Delivery from StarTech (USB-C to DisplayPort Adapter with USB Power Delivery) and Cable Matters (USB-C to 4K DisplayPort Cable with 60 W Power Delivery) and probably others. They might be an improvement over the HP Thunderbolt Dock G2 because they allow 4 lanes of DisplayPort (USB-C docks are usually limited to 2 lanes of DisplayPort when they are not connected via Thunderbolt). The Asus MB169C+ probably works fine with 2 lanes because it is only 1080p60. 4 lanes is required only if you want 4K60. You still need to convert DisplayPort output to USB-C for the display. The solutions already described in this thread should work (Huawei VR 2 cable or Wacom Link Plus or PCIe card). These adapters don't expose the USB part of the laptop's USB-C port. An adapter like the Apple USB-C Digital AV Multiport Adapter does expose the USB. Now if only they had the same adapter with DisplayPort output instead of HDMI. Still, the Wacom Link Plus might convert HDMI to USB-C with DisplayPort alt mode. Actually, there's a couple USB-C Multiport Adapters from Cable Matters that have Power Delivery, DisplayPort, and USB. The first USB-C Multiport Adapter has four lanes of DisplayPort 1.4, and an internal USB 2.0 hub for two USB 2.0 ports and a USB Ethernet port. The Cable Matters Dual Monitor USB C Hub is similar but includes a built-in two port DisplayPort 1.2 MST hub. If you combine a Huawei VR 2 cable with one of those then you might have the simplest solution with a free USB 2.0 port - but compare total price with HP Thunderbolt Dock G2 first before deciding (but also consider the speed of the USB (2.0, 3.0, 3.1 gen 2), the number of DisplayPort lanes (2 or 4), the version of DisplayPort (1.2 or 1.4) and the kind of display you might want in the future).

4) USB-A portable screens use USB signals from software instead of video signals from the GPU. They usually use DisplayLink. Cons: not as performant as video from GPU (not great for video and gaming). Pros: allows adding displays without a video connection - thereby exceeding the number of displays supported by the GPU (Intel graphics is limited to 3 displays including the laptop display, but DisplayLink is unlimited as long as there is a USB connection to use).
 

Lanky0

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There are a few options:

1) You need a USB-C dock with power deliver plus USB-C with DisplayPort alt mode output. The HP Thunderbolt Dock G2 will do that (it works with computers that have USB-C with or without Thunderbolt - it has up to 100W of Power Delivery). There may be other similar docks.

2) The Wacom Link Plus can take video from the laptop's HDMI port and convert it to USB-C with DisplayPort alt mode, leaving your USB-C port free for charging. I didn't have much luck with the HDMI input of the Wacom Link Plus, but maybe it could work for you.

3) There exist USB-C to DisplayPort output adapters with 60W of Power Delivery from StarTech (USB-C to DisplayPort Adapter with USB Power Delivery) and Cable Matters (USB-C to 4K DisplayPort Cable with 60 W Power Delivery) and probably others. They might be an improvement over the HP Thunderbolt Dock G2 because they allow 4 lanes of DisplayPort (USB-C docks are usually limited to 2 lanes of DisplayPort when they are not connected via Thunderbolt). The Asus MB169C+ probably works fine with 2 lanes because it is only 1080p60. 4 lanes is required only if you want 4K60. You still need to convert DisplayPort output to USB-C for the display. The solutions already described in this thread should work (Huawei VR 2 cable or Wacom Link Plus or PCIe card). These adapters don't expose the USB part of the laptop's USB-C port. An adapter like the Apple USB-C Digital AV Multiport Adapter does expose the USB. Now if only they had the same adapter with DisplayPort output instead of HDMI. Still, the Wacom Link Plus might convert HDMI to USB-C with DisplayPort alt mode. Actually, there's a couple USB-C Multiport Adapters from Cable Matters that have Power Delivery, DisplayPort, and USB. The first USB-C Multiport Adapter has four lanes of DisplayPort 1.4, and an internal USB 2.0 hub for two USB 2.0 ports and a USB Ethernet port. The Cable Matters Dual Monitor USB C Hub is similar but includes a built-in two port DisplayPort 1.2 MST hub. If you combine a Huawei VR 2 cable with one of those then you might have the simplest solution with a free USB 2.0 port - but compare total price with HP Thunderbolt Dock G2 first before deciding (but also consider the speed of the USB (2.0, 3.0, 3.1 gen 2), the number of DisplayPort lanes (2 or 4), the version of DisplayPort (1.2 or 1.4) and the kind of display you might want in the future).

4) USB-A portable screens use USB signals from software instead of video signals from the GPU. They usually use DisplayLink. Cons: not as performant as video from GPU (not great for video and gaming). Pros: allows adding displays without a video connection - thereby exceeding the number of displays supported by the GPU (Intel graphics is limited to 3 displays including the laptop display, but DisplayLink is unlimited as long as there is a USB connection to use).
Thanks for the reply! Very much appreciate the help.

I checked the adapters you sent but it seems they have a displayport cable/port but the screen only takes a single USB-C connector.
 

joevt

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I checked the adapters you sent but it seems they have a displayport cable/port but the screen only takes a single USB-C connector.
Check harder. The HP Thunderbolt Dock G2 has a USB-C port with DisplayPort alt mode output. The adapters with a DisplayPort output can be connected to a Huawei VR 2 cable or Wacom Link Plus which take USB and DisplayPort signals to make USB-C with DisplayPort alt mode.
 
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Hi there, slightly OT but has anyone tried using a ThunderboltEX3 in a non-TB motherboard? I'd also try the Titan Ridge version but it's a bit larger, more expensive and quite powerhungry, as far as I can tell...

Cheers,
R
 

joevt

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Hi there, slightly OT but has anyone tried using a ThunderboltEX3 in a non-TB motherboard? I'd also try the Titan Ridge version but it's a bit larger, more expensive and quite powerhungry, as far as I can tell...
For DisplayPort to USB-C with DisplayPort alt mode conversion (without USB signals), or DisplayPort to Thunderbolt conversion (without PCIe signals):
It should just work.

For USB:
ThunderboltEX3 uses Alpine Ridge so it may be similar to the GC-ALPINE RIDGE. In a non-TB motherboard, you have to supply 3.3V to the Force Power pin (or maybe keep a USB device attached), and poke a value to one of the PCIe registers of the card (while it's hiding) before the OS enumerates PCIe devices, or force re-enumeration of PCIe devices afterward.
https://forums.macrumors.com/threads/testing-tb3-aic-with-mp-5-1.2143042/post-27935050

For Thunderbolt (with PCIe signals):
I haven't tried Thunderbolt devices with a Alpine Ridge add-in card yet on a non-TB motherboard.

GC-TITAN RIDGE works for USB by connecting the Force Power pin to the middle pin and you don't need to poke any PCIe registers. You don't need the two 6 pin PCIe power connections unless you want to charge a laptop with it. You need a USB 2.0 header connection to support USB 2.0 devices.
 
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Hi,
You said one has to poke a PCIe register OR force re-enumeration? The latter sounds easier... Do you have more information on this?

R
 

joevt

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Hi,
You said one has to poke a PCIe register OR force re-enumeration? The latter sounds easier... Do you have more information on this?
I said poke and then enumerate. I linked a post that has a link to another post that has the info. I used the EFI Shell to do the poke (mm), then booted the OS which does the enumeration. I have not found or created a method to re-enumerate in macOS or Windows. I think Linux has a method to do this using sysfs (rescan). I can do the poke in macOS using a modified pciutils - any driver code can do that. macOS has IOPCIConfigurator to reenumerate PCIe devices (happens after Thunderbolt devices are connected) but I haven't looked into how a third party driver can call it.
 

Lanky0

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Check harder. The HP Thunderbolt Dock G2 has a USB-C port with DisplayPort alt mode output. The adapters with a DisplayPort output can be connected to a Huawei VR 2 cable or Wacom Link Plus which take USB and DisplayPort signals to make USB-C with DisplayPort alt mode.
I ended up buying the https://www.startech.com/ca/AV/disp...-adapters/usb-c-displayport-adapter~CDP2DPUCP but i just tried to plug it in and it does let me charge the laptop but the displayport adapater doesn't work. I am using a displayport to USB C cable https://www.amazon.co.uk/gp/product/B0744GWJ8X/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Not sure what I should try now, is it possible the cable I got is the reason?

Appreciate the help! I am really keen to get this solved as I really want to have dual screen on the move
 

joevt

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I ended up buying the https://www.startech.com/ca/AV/disp...-adapters/usb-c-displayport-adapter~CDP2DPUCP but i just tried to plug it in and it does let me charge the laptop but the displayport adapater doesn't work. I am using a displayport to USB C cable https://www.amazon.co.uk/gp/product/B0744GWJ8X/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Not sure what I should try now, is it possible the cable I got is the reason?

Appreciate the help! I am really keen to get this solved as I really want to have dual screen on the move
To connect to a USB-C display from a DisplayPort port, you need to use a bidirectional USB-C to DisplayPort cable like the one from Moshi. It supports HBR3 and is VESA certified.
https://www.displayport.org/product-manufacturer/aevoe-moshi/
You may find cheaper bidirectional cables that don't specify HBR3 support (HBR2 is good enough for 4K60) and aren't VESA certified.

Cables that are not bidirectional can only connect a DisplayPort display to a USB-C port.
 

Lanky0

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To connect to a USB-C display from a DisplayPort port, you need to use a bidirectional USB-C to DisplayPort cable like the one from Moshi. It supports HBR3 and is VESA certified.
https://www.displayport.org/product-manufacturer/aevoe-moshi/
You may find cheaper bidirectional cables that don't specify HBR3 support (HBR2 is good enough for 4K60) and aren't VESA certified.

Cables that are not bidirectional can only connect a DisplayPort display to a USB-C port.
Thanks! I am a bit confused with the cable type.

In England the cable you linked to is £50 which is half the price of the screen which is a bit much for me.

When i do a search on Amazon https://www.amazon.co.uk/s?k=bidirectional+USB-C+to+DisplayPort+cable&i=computers&ref=nb_sb_noss it seems there are no bidirectional cables?

The screen uses displayport alt mode using only a USB-C port which i guess is the reason a bidirectional cable is needed?
 

joevt

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When i do a search on Amazon https://www.amazon.co.uk/s?k=bidirectional+USB-C+to+DisplayPort+cable&i=computers&ref=nb_sb_noss it seems there are no bidirectional cables?
This might get you some results: https://www.amazon.co.uk/s?k=bidirectional+usb+type+C+to+DisplayPort&ref=nb_sb_noss

The screen uses displayport alt mode using only a USB-C port which i guess is the reason a bidirectional cable is needed?
Correct. Most USB Type C to DisplayPort cables only allowed DisplayPort signals to originate from the USB-C end (not from the DisplayPort end).
 

joevt

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Thanks, it seems to show the same results. There are 2 bidirectional from startech but they take 1m+ for delivery for some reason
You'll have to click all the cables and search the description and reviews for "directional" to be sure - can't just go by the title.
 

Nobu

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Thanks, it seems to show the same results. There are 2 bidirectional from startech but they take 1m+ for delivery for some reason
Probably ships direct from China. Also, stray endquote tag in your post.
 

Lanky0

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This might get you some results:

Correct. Most USB Type C to DisplayPort cables only allowed DisplayPort signals to originate from the USB-C end (not from the DisplayPort end).

I bought this cable which is birdirectional but it still isn't working, the screen won't power on
 
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joevt

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I bought this cable which is birdirectional but it still isn't working, the screen won't power on
Club 3D has a few VESA certified DisplayPort cables, but that isn't one of them.
https://www.displayport.org/product-manufacturer/club-3d/
But that doesn't matter - a cable doesn't need to be certified to work.

In my reply at #169 I had forgotten that you were trying to connect to a Asus MB169C+ which is a USB-C display which requires power from USB. I should have said that there is no power from DisplayPort for your display using a cable that does not include USB. I should have directed you to my earlier reply at #163 which lists the solutions that will work with your adapter, specifically the Huawei VR 2 cable or the Wacom Link Plus - either of which will provide power from USB to your display.
 

Lanky0

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Club 3D has a few VESA certified DisplayPort cables, but that isn't one of them.
https://www.displayport.org/product-manufacturer/club-3d/
But that doesn't matter - a cable doesn't need to be certified to work.

In my reply at #169 I had forgotten that you were trying to connect to a Asus MB169C+ which is a USB-C display which requires power from USB. I should have said that there is no power from DisplayPort for your display using a cable that does not include USB. I should have directed you to my earlier reply at #163 which lists the solutions that will work with your adapter, specifically the Huawei VR 2 cable or the Wacom Link Plus - either of which will provide power from USB to your display.

Ok, so i should return the startech adapter and cable I have now & buy the Wacom Link Plus? What cable would be needed for that?
 

joevt

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Ok, so i should return the startech adapter and cable I have now & buy the Wacom Link Plus? What cable would be needed for that?
You want the Startech for the Power Delivery input, don't you? Connect the Wacom Link Plus to the Startech with a DisplayPort to Mini DisplayPort cable.

Or review the options I gave in #161
 

Lanky0

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You want the Startech for the Power Delivery input, don't you? Connect the Wacom Link Plus to the Startech with a DisplayPort to Mini DisplayPort cable.

Or review the options I gave in #161

Does the displayport to mini displayport have to be bidirectional or can it be any type? How would the screen receive power if it's not using USB-C?

I saw your post in #161 said to use the wacom with an HDMI to USB-C cable directly to the screen but i am not sure how i can get it to work with the Startech adapter or if i should even use it. It's hard for me to understand all of this

Thanks
 
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joevt

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Does the displayport to mini displayport have to be bidirectional or can it be any type?
DisplayPort / mini DisplayPort cables and adapters are always bidirectional. It's only USB-C to DisplayPort that might have a one/way problem (the USB-C end of the cable has chips to tell the USB-C port what kind of cable it is).

How would the screen receive power if it's not using USB-C?
The Wacom Link Plus has a power input (mini USB 2.0). The power comes from there and goes through the USB-C cable connected between the display and the Wacom Link Plus.

The VR 2 cable has a USB type A male connector that can be plugged into a computer. Power from the computer goes from the USB port to the display.

Other solutions use a USB-C cable that can transmit power.

I saw your post in #161 said to use the wacom with an HDMI to USB-C cable directly to the screen but i am not sure how i can get it to work with the Startech adapter or if i should even use it. It's hard for me to understand all of this
If you are talking about option 2 in #161 then you need to reread it. Lookup these products. Look at the ports they have - the cables that are included, their power supplies. Draw some diagrams of the different options - how they will connect your display to your laptop. Once you know all the pieces, then you can add up their prices and decide what to do.

So option #2:
The Wacom Link Plus has thefollowing (I tested it at #159 ):
1) a USB-C port for output to your display (includes DisplayPort and USB 2.0 signal)
2) a USB 2.0 Micro-B input port to connect to your computer. The USB 2.0 signal will be included in the USB-C output.
3) a Mini DisplayPort input from your computer. Direct connection: USB-C to mini DisplayPort connection but then you loose power to your laptop so you use the Startech with a DisplayPort to Mini DisplayPort cable.
4) an HDMI input from your computer. You can use this instead of DisplayPort. That will free up your Laptop's USB-C port.
5) a USB-C input for power for the Wacom Link Plus and display. You'll probably get enough power with a USB type A to USB-C cable. I forget what cables are included.
 

Lanky0

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DisplayPort / mini DisplayPort cables and adapters are always bidirectional. It's only USB-C to DisplayPort that might have a one/way problem (the USB-C end of the cable has chips to tell the USB-C port what kind of cable it is).


The Wacom Link Plus has a power input (mini USB 2.0). The power comes from there and goes through the USB-C cable connected between the display and the Wacom Link Plus.

The VR 2 cable has a USB type A male connector that can be plugged into a computer. Power from the computer goes from the USB port to the display.

Other solutions use a USB-C cable that can transmit power.


If you are talking about option 2 in #161 then you need to reread it. Lookup these products. Look at the ports they have - the cables that are included, their power supplies. Draw some diagrams of the different options - how they will connect your display to your laptop. Once you know all the pieces, then you can add up their prices and decide what to do.

So option #2:
The Wacom Link Plus has thefollowing (I tested it at #159 ):
1) a USB-C port for output to your display (includes DisplayPort and USB 2.0 signal)
2) a USB 2.0 Micro-B input port to connect to your computer. The USB 2.0 signal will be included in the USB-C output.
3) a Mini DisplayPort input from your computer. Direct connection: USB-C to mini DisplayPort connection but then you loose power to your laptop so you use the Startech with a DisplayPort to Mini DisplayPort cable.
4) an HDMI input from your computer. You can use this instead of DisplayPort. That will free up your Laptop's USB-C port.
5) a USB-C input for power for the Wacom Link Plus and display. You'll probably get enough power with a USB type A to USB-C cable. I forget what cables are included.
Thanks! I think i have a better understanding now

So i've ordered the Wacom Link Plus and will try the following

1. Hdmi direct from laptop to Wacom Link Plus, then USB-C to USB-C cable that passes displayport signal from Wacom Link Plus to the screen.
2. Displayport to mini-DisplayPort cable from Startech adapter to Wacom Link Plus, then USB-C to USB-C cable that passes displayport signal from Wacom Link Plus to the screen.

I ordered all the cables etc. from Amazon, will see what works then return everything else.

Thanks for the help, i will be so happy if i get this working :)
 
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So does the Apple USB-C Digital AV Multiport Adapter (A1621 or A2119) work to power and drive something like the HP s14 monitor, or no?
 

joevt

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So does the Apple USB-C Digital AV Multiport Adapter (A1621 or A2119) work to power and drive something like the HP s14 monitor, or no?
The Apple USB-C Digital AV Multiport Adapter only works one way. The USB-C port connects to the computer. The HDMI port connects to a display. It will not work with the HP s14. It converts two lanes of DisplayPort to create an HDMI signal. It will not convert an HDMI signal (from the HDMI port) to a DisplayPort signal (on the USB-C end) like the Wacom Link Plus does.
 

Lanky0

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DisplayPort / mini DisplayPort cables and adapters are always bidirectional. It's only USB-C to DisplayPort that might have a one/way problem (the USB-C end of the cable has chips to tell the USB-C port what kind of cable it is).


The Wacom Link Plus has a power input (mini USB 2.0). The power comes from there and goes through the USB-C cable connected between the display and the Wacom Link Plus.

The VR 2 cable has a USB type A male connector that can be plugged into a computer. Power from the computer goes from the USB port to the display.

Other solutions use a USB-C cable that can transmit power.


If you are talking about option 2 in #161 then you need to reread it. Lookup these products. Look at the ports they have - the cables that are included, their power supplies. Draw some diagrams of the different options - how they will connect your display to your laptop. Once you know all the pieces, then you can add up their prices and decide what to do.

So option #2:
The Wacom Link Plus has thefollowing (I tested it at #159 ):
1) a USB-C port for output to your display (includes DisplayPort and USB 2.0 signal)
2) a USB 2.0 Micro-B input port to connect to your computer. The USB 2.0 signal will be included in the USB-C output.
3) a Mini DisplayPort input from your computer. Direct connection: USB-C to mini DisplayPort connection but then you loose power to your laptop so you use the Startech with a DisplayPort to Mini DisplayPort cable.
4) an HDMI input from your computer. You can use this instead of DisplayPort. That will free up your Laptop's USB-C port.
5) a USB-C input for power for the Wacom Link Plus and display. You'll probably get enough power with a USB type A to USB-C cable. I forget what cables are included.

So i got it working with both methods i mentioned in my last post! Thanks a lot for your help, sorry for asking a lot of questions but this whole power delivery/USB-C/displayport signal stuff is hard for me to grasp. I am interested to stay up to date and get a better understanding, where would you recommend I read or follow in order to do so?

I think i'll choose the HDMI option as it eliminates the need for the Startech adapter (£25). I managed to power the Wacom Link Plus with a USB A to USB-C cable that goes from an external wall plug. I also powered it by using the same cable from the laptop's USB A port directly into the Wacom Link Plus USC-C input. I couldn't, however, get it to power on the screen using the USB A (from laptop port) to micro USB input in the Wacom Link Plus but this is not such an issue as I can just use a USB A to C cable instead.

Thanks again for the help! Really appreciate it
 

joevt

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I am interested to stay up to date and get a better understanding, where would you recommend I read or follow in order to do so?
Use Wikipedia to lookup stuff like "DisplayPort" "USB", "USB Hardware", "USB-C", "Thunderbolt", etc.

I think i'll choose the HDMI option as it eliminates the need for the Startech adapter (£25).
You have no problems with HDMI input, screen going dark, etc? When I tried it, it was unreliable, but that may just be my cables or adapters cousing a problem. HDMI 1.4 is fine since you have a display that is smaller than 4K.

I managed to power the Wacom Link Plus with a USB A to USB-C cable that goes from an external wall plug.
The Wacom Link Plus doesn't come with a power supply. You are expected to use the power supply that comes with the Wacom Cintiq Pro that the Wacom Link Plus is meant for but any USB-C power input will work as you found. Where did your USB-A to USB-C and wall plug come from?

I also powered it by using the same cable from the laptop's USB A port directly into the Wacom Link Plus USC-C input. I couldn't, however, get it to power on the screen using the USB A (from laptop port) to micro USB input in the Wacom Link Plus but this is not such an issue as I can just use a USB A to C cable instead.
You're saying that you can power the display using the laptop's USB-A port only if it's connected to the USB-C power input of the Wacom Link Plus? This matches my findings at #159
Your display doesn't have any USB functions (USB ports, touchscreen input, audio, etc.) so you don't need the USB micro B connection?
 

Lanky0

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Use Wikipedia to lookup stuff like "DisplayPort" "USB", "USB Hardware", "USB-C", "Thunderbolt", etc.


You have no problems with HDMI input, screen going dark, etc? When I tried it, it was unreliable, but that may just be my cables or adapters cousing a problem. HDMI 1.4 is fine since you have a display that is smaller than 4K.


The Wacom Link Plus doesn't come with a power supply. You are expected to use the power supply that comes with the Wacom Cintiq Pro that the Wacom Link Plus is meant for but any USB-C power input will work as you found. Where did your USB-A to USB-C and wall plug come from?


You're saying that you can power the display using the laptop's USB-A port only if it's connected to the USB-C power input of the Wacom Link Plus? This matches my findings at #159
Your display doesn't have any USB functions (USB ports, touchscreen input, audio, etc.) so you don't need the USB micro B connection?
For the HDMI input, so far I've only had issues when turning the brightness up on the screen. If the brightness is low i didn't experience any problems but when i put it to 100% i just had the scren turn black.

To power the Wacom I've tried the following with success:

- USB A to USB-C cable from laptop to Wacom
- USB A to USB-C cable from a Quntis power adapter wall charger, it's basically a wall plug adapter with 1 USB C port + 4 USB A ports.
- USB C from non PD USB C port on laptop to USB-C into the Wacom - but i've noticed the laptop randomly stops charging for a split second when both USB C ports are being used, not sure how this is related to the screen being powered as they are separate ports.

Using a USB A to micro USB cable from laptop directly to Wacom is not powering the Wacom.
 
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Lanky0

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For the HDMI input, so far I've only had issues when turning the brightness up on the screen. If the brightness is low i didn't experience any problems but when i put it to 100% i just had the scren turn black.

To power the Wacom I've tried the following with success:

- USB A to USB-C cable from laptop to Wacom
- USB A to USB-C cable from a Quntis power adapter wall charger, it's basically a wall plug adapter with 1 USB C port + 4 USB A ports.
- USB C from non PD USB C port on laptop to USB-C into the Wacom - but i've noticed the laptop randomly stops charging for a split second when both USB C ports are being used, not sure how this is related to the screen being powered as they are separate ports.

Using a USB A to micro USB cable from laptop directly to Wacom is not powering the Wacom.
Just to add, the USB A to USB-C cable from laptop to Wacom also randomly stops charging the laptop, similar to usin the non PD USB-C port on the laptop, i guess it's related to the power of the laptop output because it doesn't occur when powering the wacom from the wall plug adapter.
 
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