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by suvelx 2477 days ago
How many DisplayPort channels do each ports support?

How many PCI-E lanes does each port get?

Do the ports share the channels/lanes?

Do they both support Power Delivery? How many Watts does the thinkpad need to charge?

Even with 'clear' labelling, it can still be a crapshot as to the full capabilities of the device.
1 comments
Stratoscope 2477 days ago
Well, this is where we get the phrase "Plug and Pray", isn't it! ;-)

Right now I have an Uptab Mini-DisplayPort adapter in one port, and a StarTech full size DisplayPort adapter in the other. The Uptab adapter has its own USB-C input for power, so that is where the power supply is connected.

The mini and full size DisplayPorts are each connected to a 4K monitor, and I use all three - the two externals and the ThinkPad's WQHD. This all works great when the Uptab is in the rearmost USB-C port and the StarTech is in the other port. But if I switch the two around, one of the monitors goes into low resolution mode!

This kludgy configuration is just because these were the adapters I had on hand. There are a number of adapters that plug into a USB-C port and give you two mini-DisplayPort outputs - I have been meaning to try one out.

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