Why my Lenovo Thinkpad E16 Gen3 (model 21SR007DUS with Intel Core 22U5, running Win11 25H2 with Thunderbolt4 support) when connected to a Plugable TBT4-UD5 recognizes only one external monitor?
Use conditions:
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I have updated all drivers to latest versions as of 2/18/26
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I am using the provided Plugable Thunderbol4 cable
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Both monitors support HDMI
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Both monitors work if connected individually
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I can get both to work concurrently if one is connected directly to
Thinkpad HDMI port and the other to TBT4-UD5 HDMI Port 1 (not on port 2) -
I can even get the Thinkpad to support all three monitors (the built-in monitor plus two external) as long as one of the HDMI monitors is connected directly to the laptop.
NOTE: In case this helps, I can get the “sleeping” laptop to get back to life by pressing the dock station power button. I CANNOT turn it on from shutdown state, though. If turning on from shutdown is supported, I’d like to know how to enable.#SecondMonitor #2ndMonitorSupport #TwoMonitor #2ndMonWontWork #2ndMonitordoesnotwork