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austibor
What's DOS?
Posts: 2
Registered: ‎04-01-2018
Location: AU
Views: 650
Message 1 of 3

Yoga 920 + Thunderbolt 3 Dock Monitors sleep issue

Hi,

 

I  got Yoga 920 with Lenovo Thunderbolt 3 Dock that is connected to two 4k Samsung monitors.

 

Just recently when I put Yoga 920 to sleep the monitors will switch off, but in 10-15 sec start looking for a signal.

Basicaly screen goes to black (looks like monitor is off) and then in 10 sec it switches on a show blank screen with input name on (DisplayPort) and than it goes off and in 10 sec on with input name ..... this keeps cycling on and off.

 

This is happening on both monitors.

 

It's strange as it used to work fine untill recently (apropox 1 week ago).

 

Im on latest bios with Yoga 920 and latest firmware for Thunderbolt 3 Dock and Lenovo Vantage says my system is up to date.

 

The windows recently updated to Windows 10 (1709), not sure if that is related.

 

Any help how to fix this issue?

 

 

TPham1948
Token Ring
Posts: 62
Registered: ‎02-02-2018
Location: US
Views: 586
Message 2 of 3

Re: Yoga 920 + Thunderbolt 3 Dock Monitors sleep issue

Hi,
How do you connect the monitors to the dock ? Using both DP ports, or DP Port + HDMI port?
In addition, do you use use the laptop screen with the external monitor?
Cheers
austibor
What's DOS?
Posts: 2
Registered: ‎04-01-2018
Location: AU
Views: 573
Message 3 of 3

Re: Yoga 920 + Thunderbolt 3 Dock Monitors sleep issue

Monitor 1 is connected using docks Display Port 1 connecting to DisplayPort on Monitor 1.

Monitor 2 is connected using docks front usb-c/thunderbolt 3 port connecting to DisplayPort on Monitor 2.

 

Forgot to add that my laptop screen is switched off when docked.

 

Also noticed that when i unplug laptop from the dock the monitor are displaying same problem!

 

So looks like problem with the dock!

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