11-01-2017 07:19 AM
Just got my new Yoga 920, works great, except in one scenario. When I boot the laptop while the USB-C is connected to an extra monitor, the laptop screen doesn't show up,. Instead I see flickering login screen with no way to stop it. Unplugging the USB-C to HDMI adapter has no effect, I have to do a force shutdown and start the machine without the HDMI adapter. Any idea what's going on? Thanks.
12-06-2017 08:13 AM
Thanks for using the Lenovo forums.
Unfortuantely not seen this one yet, Try to download the Video and Chipset drivers for the unit from the support page. Make sure to reboot after an update on the unit.
Hope this helps, let us know how you get on.
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12-07-2017 11:56 PM
I have the same issue with my Lenovo Yoga 920, although my problem is fixed by disconnecting the USB-C cable and then reconnecting it. Then the image on the laptop screen is restored. After plugging the USB-C cable in again, both my external monitor and the laptop screen start working again without issues.
However, I have been forced to configure my power plan in Windows 10 to not turn off the display after a few minutes of activity. Allowing Windows to turn off the displays to save power produces the same effect: The external monitor doesn't detect an input signal again after resuming from the display being turned off and the laptop screen starts flickering heavily and going dark, barely allowing you to see that there is actually something running on the laptop.
Again, this issue restored by disconnecting the USB-C cable, allowing the laptop to recuperate, and then plugging it back in again. After that both monitors, internal and external, start working again.
My external USB-C hub is: Kensington USB-C Universal Dock 60W (SD4600P). It allows me to connect an external 4k monitor, keyboard and mouse and Ethernet network. It also powers the laptop through the USB-C port, charging it while connected.