07-26-2018 02:23 PM
I have an X1 Carbon Gen6 ThinkPad and have connected it to a ThinkPad Ultra Dock (40AJ0135US) using Windows 10. I'm trying to connect two external two displays, but only one will work at a time. The resoultion on both displays are 1920 x1080 with a refresh rate of 60p HZ. I'm using new DisplayPort to HDMI cables to connect each monitor.
Only a single external monitor will be active at a time. I've swapped the cables and they're both fine. I've updated the Windows 10 and Lenovo drivers. This same configuration worked with my previous T420s ThinkPad laptop and the Intel graphics.
Any help or advice would be greatly appreciated! Thank you.
Solved! Go to Solution.
07-30-2018 12:22 AM
I tested the X1 Carbon 6th Gen with the following conditions;
- Windows 10 Version 1709 (RS3)
- Video Driver : 220.127.116.1118 (latest as of 2018/07/30)
- BIOS: v1.27 (N23ET52W) (latest as of 2018/07/30)
Monitor-1: EIZO FlexScan S2243W (Max:1920x1200) under 1920x1080 @ 60Hz by DisplayPort cable
Monitor-2: Dell UP3214Qt (Max: 3840x2160) under 1920x1080 @ 60Hz by HDMI cable
Monitor-3: LG 27MU67-B (Max: 3840x2160) under 1920x1080 @ 60Hz by HDMI cable w/ DP to HDMI Adaptor
Monitor-4: Lenovo L2461xwA (Max: 1920x1080) under 1920x1080 @ 60Hz by HDMI cablew/ DP to HDMI Adaptor
Initially, when above monitors attached to the Pro Dock, I also experienced similar detection problem, i.e. one of the external monitors or both of them are not displayed. However, after I used Intel UHD Graphics Control Panel application to configure each monitor settings, I can use all of above monitors with the following combinations.
- Case 1: Monitor-1 and Monitor-2 to DP and HDMI ports respectively, I can use both external monitors simultaneously.
- Case 2: Attached the Monitor-3 and Monitor-4 to DP ports via "DP to HDMI Adaptor", I can use both external monitor simultaneously.
Please note that monitors would be configured to max resolution when attach to the system at the first time, customer needs to use Intel Gfx Control Panel to customize each monitor resolution and frequency.
This wuould help you to configure your external monitors.
08-31-2018 10:59 AM
When I bought my X1 Carbon Gen6 I looked at the Ultra Dock but disliked the fact that it used a lot of the laptop's existing ports and was a proprietary solution. Instead I bought the CalDigit TS3 Plus which is a Thunderbolt extender. I run 2 screens off it with no problem.
The TS3 Plus has a lot of extra ports over the Lenovo offerings, including a SDXC card reader & it only uses up 1 Thunderbolt port on the laptop, leaving the others free for use. It will work with any Thnuderbolt equipped laptop, not just the latest Lenovo custom docking port.