English Community

Lenovo NotebooksLenovo Yoga Series Notebooks
All Forum Topics
Options

3 Posts

07-03-2017

AU

7 Signins

44 Page Views

  • Posts: 3
  • Registered: ‎07-03-2017
  • Location: AU
  • Views: 44
  • Message 101 of 164

Re: Yoga 720 dock compatibility

2017-08-04, 13:36 PM

All sorted and working for me now,  turns out I had three faulty cables.  1 x USB-C and 2 x Display Port.

 

Not sure what the chances of that are, but happy to have it up and running.  

 

Thanks everyone, very helpful topic.

Reply
Options

1 Posts

08-11-2017

DE

4 Signins

32 Page Views

  • Posts: 1
  • Registered: ‎08-11-2017
  • Location: DE
  • Views: 32
  • Message 102 of 164

Re: Yoga 720 dock compatibility

2017-08-11, 13:10 PM

Hi, 

 

Did anybody try to use the Yoga 720 15 with two external monitors using Linux? 

 

Best regards, 

Sebastian 

Reply
Options

182 Posts

04-08-2014

US

226 Signins

1637 Page Views

  • Posts: 182
  • Registered: ‎04-08-2014
  • Location: US
  • Views: 1637
  • Message 103 of 164

Re: Yoga 720 dock compatibility

2017-08-11, 22:37 PM


Hey OP, I think you could do 3 externals if one of them uses VGA, with the Yoga 720 15IKB. I also think you might be able to do 4 monitors over the dual DP ports, as I verified at least one of the DP ports supports daisy-chaining dual QHD@60Hz monitors. And both DP ports work at the same time, though I didn't try daisy-chaining through both of them (I am on vacation this week but went into work to test this out since apparently no one on Earth knew the answer).

 

Also, I don't agree with your marked solution, haha!


For fun, I decided to try 3 and 4 external monitors today. The results conclude that you can have up to 3 displays active but no more. While the dock and Intel chip detects up to 6 displays at once in my testing (4 DP-connected diplays, 1 VGA, and the built-in UHD), it only lets you enable any 3 at a time. This includes any combination of connections, like 2 DP's and 1 VGA, or 3 DP's using both DP's on the dock and 1 daisy chained, or 1 DP 1 VGA and the built-in UHD display, etc.

 

It also appears that DP's own specs might be wrong, because they claim 1 DP output can support a maximum of two (2) 2560x1600@60Hz displays with 1 being daisy-chained. Yet I managed to get 3 monitors going from 1 DP output: two 2560x1440@60Hz and 1 more 1680x1050@60Hz (2 monitors daisy-chained). I was probably pushing the boundaries of what DP can do I guess.

 

The IntelHD port topology screen is interesting:

 

Anyway, just wanted to conclude that this dock and laptop max out at 3 total displays, no matter how they're connected.

Reply
Options

1 Posts

08-14-2017

US

1 Signins

18 Page Views

  • Posts: 1
  • Registered: ‎08-14-2017
  • Location: US
  • Views: 18
  • Message 104 of 164

Re: Yoga 720 dock compatibility

2017-08-14, 1:09 AM

Would you mind explaining your set up to me? I recently purchased the Lenovo Yoga 720 intending on hooking it up to 1 external monitor for dual screen use. I am new to this so am not sure what extensions to get. My external screen is a 2008 Samsung screen with a VGA output. I purchased a VGA to Type C splitter which doesn't connect correctly to my Lenovo. Any suggestions on getting this to work like yours does? 

Reply
Options

2 Posts

08-16-2017

US

3 Signins

30 Page Views

  • Posts: 2
  • Registered: ‎08-16-2017
  • Location: US
  • Views: 30
  • Message 105 of 164

Re: Yoga 720 dock compatibility

2017-08-16, 7:35 AM

I  think the 3 active outputs is limited by the intel graphics rather the dock or the bandwidth of displayport, because it is written here https://ark.intel.com/products/97185/Intel-Core-i7-7700HQ-Processor-6M-Cache-up-to-3_80-GHz

that only 3 active displays are supported. BTW, can you try dual 4k / three 2k display on the dock as well? I am planning the get the dock but am still unsure whether it can output dual 4k @ 60hz

Reply
Options

182 Posts

04-08-2014

US

226 Signins

1637 Page Views

  • Posts: 182
  • Registered: ‎04-08-2014
  • Location: US
  • Views: 1637
  • Message 106 of 164

Re: Yoga 720 dock compatibility

2017-08-16, 18:08 PM

wrote:

I  think the 3 active outputs is limited by the intel graphics rather the dock or the bandwidth of displayport, because it is written here https://ark.intel.com/products/97185/Intel-Core-i7-7700HQ-Processor-6M-Cache-up-to-3_80-GHz

only 3 active displays are supported. BTW, can you try dual 4k / three 2k display on the dock as well? I am planning the get the dock but am still unsure whether it can output dual 4k @ 60hz


Yeah you're right, the limitation is with Intel's chip/driver, and Intel has limited it to 3 displays for a long time if I remember correctly. And since we can only choose between "intel only" and "optimus" in the BIOS (unlike my W530 where you can choose between 3 modes, NVIDIA-only being one of them), there is no way to avoid using the Intel HD device.

 

Sorry, I can't test dual UHD on the dock, or triple QHD, as I don't have them available to me and my 50 co-workers are all plebeians on FHD or 1680x1050 displays. I am literally the only one with anything over FHD. My UHD TV at home won't really help test this either.

 

what it's worth, the Intel chip is doing dual QHD and a single UHD display right now, but the UHD is the laptop display. It at least shows that the Intel stuff can handle it, and it does show that the internal screen as being driven by the one-and-only "port 1" in the topology settings screen. The dock can certainly do dual QHD from 1 DP port via daisy chain or from both DP ports without daisy chain, so I suspect it could do triple QHD @ 60Hz. The dual UHD @ 60Hz is a bigger mystery, but I have a feeling it can do it. This page: https://support.lenovo.com/us/en/solutions/pd029622 claims that only the Carbon X1 and Yoga X1 can do it on the TB3 dock, but they also claim that the Yoga 720 isn't even compatible with the TB3 dock, so I don't really trust anything that graph shows.

 

Reply
Options

1 Posts

08-22-2017

RS

1 Signins

6 Page Views

  • Posts: 1
  • Registered: ‎08-22-2017
  • Location: RS
  • Views: 6
  • Message 107 of 164

Re: Yoga 720 dock compatibility

2017-08-22, 5:48 AM

Hey did you or anyone alse tried basic daisy chaining without any docking station, just basic usb-c to DP cable? And if yes, does it work?
Laptop (usb-c to DP) > Monitor 1 (mDP to DP) > Monitor 2?

Reply
Options

1 Posts

09-06-2017

US

2 Signins

26 Page Views

  • Posts: 1
  • Registered: ‎09-06-2017
  • Location: US
  • Views: 26
  • Message 108 of 164

Re: Yoga 720 dock compatibility

2017-09-06, 18:33 PM

I've just received a 720 15" and Lenovo USB-C Dock, installed the drivers and plugged dock in. Plugged wireless mouse into dock, vga monitor in. Nothing works. Cable from dock to usb-c thunderbolt port on laptop. Am I missing something?

 

 

Reply
Options

182 Posts

04-08-2014

US

226 Signins

1637 Page Views

  • Posts: 182
  • Registered: ‎04-08-2014
  • Location: US
  • Views: 1637
  • Message 109 of 164

Re: Yoga 720 dock compatibility

2017-09-06, 21:56 PM

wrote:

I've just received a 720 15" and Lenovo USB-C Dock, installed the drivers and plugged dock in. Plugged wireless mouse into dock, vga monitor in. Nothing works. Cable from dock to usb-c thunderbolt port on laptop. Am I missing something?

 

 


Dumb question, but you did plug the 90W PSU into the docking station, right?

Reply
Options

2 Posts

08-16-2017

US

3 Signins

30 Page Views

  • Posts: 2
  • Registered: ‎08-16-2017
  • Location: US
  • Views: 30
  • Message 110 of 164

Re: Yoga 720 dock compatibility

2017-09-09, 6:37 AM

Just got my lenovo thunderbolt 3 dock this week. The dock can only output dual 4k @ 30hz via the 2 displayports connected to 2 LG 24UD58. It is a true shame that lenovo has gone cheap with this machine and gimped its ability to output dual 4k @ 60hz via thunderbolt 3.

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete