05-17-2018 08:20 AM
I work IT for a US HQ company and we have a user in our smaller London office who has a T470 and he is trying to connect 2 external displays to it.
Both displays are Dell P2210 https://noteboox.de/mediafiles/Sonstiges/Dell-Professional-P2210-Users-Guide.pdf which have 1 VGA, 1 DVI-D and one DIsplayPort.
We don't have any T470's here in US that I can test to replicate his issue on. The T470 has an HDMI port and a USB-C port. He currently has one of the monitors successfully connected via a HDMI(male) to VGA(F) adapter.
When he tries to connect his 2nd monitor via the USB-C the PC will not detect it. He is using a USB-C to DIsplayPort cable USB Type C(Thunderbolt 3) to DisplayPort 4K@60Hz UHD 6 Feet Cable
From all I have read on this machine, it should be able to use the USB-C and HDMI port at the same time for video.
I don't want to just tell him to go get a different cable, as I'm not sure if there's something I'm missing here.
The T470 does support video over USB-C am I correct? All the specs sheet says on the 470 is "Lenovo USB-C to VGA adapter, optional."
This is not very helpful and does not specify if it will support video over other means, nor if this "Lenovo adapter" is a converter or simply an adapter.
Can someone please help me pinpoint where my issue might be? Thanks.
05-17-2018 08:41 AM
I'm having the same problem with that dock on x1 Carbons. What's odd is that the computer thinks the second monitor is working fine. If I Remte Desktop into the computer I can use the second monitor fine. The Monitor even wakes up when the computer boots but then displays 'no signal detected' after searching it's available ports.
05-17-2018 08:51 AM
I thought my answer would be in the BIOS under "shared display priority" but nope only 2 choices under there in the BIOS menu of the T470, "HDMI" and "Dock connector."
Frustrating as the HDMI and USB-C are the only 2 ports on this model that are at all capable of connecting a display. Let me know if you find out any more info as this one has me pretty stumped.