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2 Posts

10-09-2019

Slovenia

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Legion Y540 USB type C compatibility

2019-10-09, 16:49 PM

Hello.

 

I've recently purchased the laptop in question and saw it has a USB type C port.

 

I tried plugging a cable into it but nothing happened.

 

I tried plugging it into the wall socket with a USB C and nothing happened.

 

Is there any point to it?

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12747 Posts

11-30-2015

Philippines

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Re: Legion Y540 USB type C compatibility

2019-10-09, 17:42 PM

Hi mattx1233,

 

Welcome to the Community Forums.

 

As showed in the user manual page 8, the Type C USB port is not intended to charge the laptop. What it does is :

 

• Charge USB-C compatible devices with the output voltage and current of 5 V and 3A.


• Transfer data at USB 3.1 speed, up to 5 Gbps.

 

• Connect to an external display.
– USB-C to VGA: 1900 × 1200 pixels, 60 Hz
– USB-C to DP: 3840 × 2160 pixels, 60 Hz

 

I hope this helps answer your query.

 

Regards

 



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1 Posts

03-28-2020

Germany

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Re:Legion Y540 USB type C compatibility

2020-03-28, 11:43 AM

Hello, is it possible to connect with two Displays via usb-c?  With a USB-C Dockingstation? 

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1 Posts

04-26-2020

Peru

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Re:Legion Y540 USB type C compatibility

2020-04-26, 21:30 PM

Hi. 

 

In the case I need to connect a type c earphones, it is possible? Or I have to buy an adapter to use them?

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1 Posts

07-17-2020

United States of America

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Re:Legion Y540 USB type C compatibility

2020-07-17, 16:54 PM
Does it support charge through type c port..?
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2 Posts

08-01-2020

Afghanistan

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Re:Legion Y540 USB type C compatibility

2020-08-01, 9:17 AM

Sure can.
DP over USB Type C is just regular Displayport 1.4, which has Multi-Stream Transport (mst) which also streaming more then 1 monitor over the same cable.
https://en.wikipedia.org/wiki/DisplayPort#Multi-Stream_Transport_(MST)

and yes, mst does work over USB Type C 

In regards to how many monitors you can do (in general),
Intel integrated graphics supports up to 3 (last I checked)
Nvidia supports up to 4 monitors (which this computer uses Nvidia so the computer does 4 monitors).
AMD supports up to 6 monitors.

The laptop screen does count as one.  So with the Y540, you can either do 3 external and the laptop monitor, or 4 external and disable the laptop.


In regards to how

Option 1 ( not the best imo )
You can get monitors that let your daisy chain but there kinda rare (mostly only seen dell make these things), so I would just grab a docking station that supports mst.
Here is a description.  Anyone know if lenevo makes one?  I have yet to see one myself.
https://www.dell.com/support/article/en-us/sln293813/how-to-daisy-chain-multiple-monitors-using-displayport-multi-stream-transport-mst?lang=en


Option 2 ( best imo )
Just get a dock or dp splitter that support mst.
One thing to note though, while a dp 1.2 will work it's better to make sure the hub and splitter is DisplayPort 1.4 and NOT 1.2...
Mainly because DP 1.4 will support higher resolution and higher framerates across multiple monitor on the same DP connector.


Most docking stations out there are 1.2 which supports a lower bandwidth.

I recommend this guy for USB C.  It's a simple DP 1.4 mst hub.  Has 2 DP and 1 HMDI ports.  Uses 0.3 amp per port you connect, so 0.9 amp max
https://www.amazon.com/gp/product/B07XYCHGQM/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
It's self powered buy usb type C, so no need to plug anything into the other USB C power on the hub ( it has it there for laptop that support it, but the Y540 does not so you can just ignore it )


If you want DP, this is the same 1.4 mst splitter hub as above but with a DP connection.  This requires an external power source so you would plug a wall wart into the USB C power port on the hub.  Has the same 2 DP and 1 HMDI ports
https://www.amazon.com/Cable-Matters-DisplayPort-Splitter-Windows/dp/B08B44D3FB/ref=sr_1_4?dchild=1&keywords=cable+matters+mst+hub+usb+c&qid=1596270807&sr=8-4

While sure any other dock or hub with DP mst from lenevo would work fine ( I would call Lenevo and ask if you are unsure ), the two I listed above I purchased for myself and have at home for personal use with the laptop ( and use with other computers / laptops as well ).

With the Y540, I tested both of them and they work fine.  For the Y540 though, USB C one is the better of the two.  Mainly cause you just need the one USB Type C cable to plug into the Y540 and no power supply needed.
Reason why I think this option is best is because you can use any 2 monitors with a DP and a third one with a HMDI connection.
The order in which you populate the hubs does not matter.  You don't need all three filled to use.


In case you where wondering, yeah you can even mix an match what you are throwing over the USB type C and DP connection.   3 on USB C and 1 on DP, 2 on USB C and 2 on DP, 1 on USB C and 3 on DP, or maybe laptop monitor with 2 on USB C and 1 on DP.


Even more fun stuff to note is that the RTX 2060 has Display Stream Compression (DSC) so you can push more resolution/frames if the monitor you got supports it.
 


DP is one nifty protocol that really outshines HDMI in terms of capabilities.
Whatever laptop you get, should prolly lean towards having at least one imo.
That and a USB port with DP alt mode.
Both give you monitors for days...

and yes, the Y540 has both :)

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2 Posts

08-01-2020

Afghanistan

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Re:Legion Y540 USB type C compatibility

2020-08-01, 10:33 AM

Oh, and no it does not support charging over usb type C

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10 Posts

08-19-2019

United States of America

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  • Message 8 of 9

Re:Legion Y540 USB type C compatibility

2021-01-06, 18:54 PM

Hi L8feL8ne,

 

First of all thank you for all of this very helpful information, and sorry for the barrage of questions below.

 

I have a Y540 81SX model with RTX 2060, i7-9750h, and the 144 Hz built in display.  I believe I'll have to turn off Hybrid mode so it doesn't use the integrated graphics which bottlenecks it to 3 screens max.  Right now I plug in a mini-DP 1200p monitor, HDMI 1080p monitor, and use the built-in display.  But I'm trying to add my second 1200p into the mix for a total of 4 screens and hopefully reduce the number of things I have to plug into the laptop.

 

From what I could find, since the Y540 USB-C 3.1 port is only Gen 1 (non-thunderbolt) I don't think it can support DP 1.4 with MST and can only do 1.2.  Does that change any of the options you layed out here like reduce the number of monitors a USB-C or mini-DP port can handle?  If I either hookup 3 external monitors as well as use the built in display or disable it and use 4 external monitors for a total of 4 screens either way, are these limited to 1080p?  I'm trying to do a setup with 2X 1200p 60 Hz external monitors, 1X 1080p 60 Hz external monitor, and the built in 1080p 144 Hz monitor as mentioned above but would would hope that it could support future monitor upgrades.

 

From searching online I found a reddit post from someone with my exact same laptop vouching that this hub works for them to run 2 monitors in combination with a separate mini-DP and HDMI to run 4 external 1080p monitors (not using the built in screen) but none are above 1080p.  I think I'm planning on doing similar but just using the built-in display instead of either the mini-DP or HDMI for the third external monitor (with potential to use both other ports instead of the built-in display similar to the other user) but with 2 monitors above 1080p.

 

Would this work, and would using a mini-DP hub for 2 displays be better or worse than a USB-C one given that it's only DP 1.2 (I know you favored USB-C because it's powered)?  Is either port more capable of handling above 1080p for 2 monitors, and if so what is the limit?  Would it still be possible to potentially run 3 monitors through a single port and a 4th screen either through a second port or just the integrated display as you mentioned it should be able to do if it were DP 1.4?  Is there a recommended Lenovo (or not) hub that can do this?  If the hub you linked above would actually support it all then the only other things I'd have to plug in would be my USB 3.0 hub, power, and ethernet but I can definitely live with that and could even run a second ethernet cable to reduce the difference to 1 plugin from a more massive hub.

 

I'd like to also plug ethernet and a USB 3.0 hub for peripherals into whatever hub I use to reduce the number of things I have to plug in when switching laptops.  My work computer that I also will have to use with the same setup is a Dell Precision 7710 laptop that has the same connections just a better USB-C that can support thunderbolt which is why I think a USB-C hub might be the way to go.  I already have a Dell TB16 hub but because it's thunderbolt it's not compatible with my Y540 so I can't use it.

 

On a related note, I'm exploring the idea of having both laptops with their own hub setups instead (Y540 as above, 7710 with the TB16) that are both always plugged into all monitors.  I'm just not sure if/how the monitors would handle switching between the two especially because I'd have to use different monitor ports.  The 1200p monitors (24" U2412Mb) have full sized DP, VGA, and DVD-I, then the 1080p external has only 1 HDMI (15" XP-PEN Artist16 Pro penscreen) so I'd have to manually switch it between laptops but if that's all I'd have to do that's not bad or I could potentially get a switch or something to handle that 1 connection but I haven't looked into that yet.

 

Thank you!

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10 Posts

01-14-2021

United States of America

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  • Message 9 of 9

Re:Legion Y540 USB type C compatibility

2021-09-17, 14:11 PM

The USB-C on Legion Y540 doesn't work for charging becasue as they say it cannot carry as much power for a gaming laptop.

 

You can only plugin USB C type flash drives for somewhat faster transfer rate.

And you can plugin some docking stations for extending capabilities.

However, the docking station won't charge it.

 

This is frustrating since the charging port on Legion Y540 or any Legion of this type of design fail pretty early. and you cannot obviously charge with usb-C. This is a laptop to avoid in general. And you know about Lenovo customer service. none to 0 care.

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