T420s + Mini Dock Plus Series 3 with USB 3.0 90W - USB 3.0 works as USB 2.0

Greetings!
I am most probably not the first one who is interested, but I failed to find the same topic in the forum.
I have Lenovo T420s plugged into ThinkPad Mini Dock Plus Series 3 with USB 3.0 90W. The problem I have USB 3.0 port on the dock (blue one) works as USB 2.0. The laptop port works fine. I am checking it by plugging Seagate mobile HDD - when the HDD is plugged into the blue port on the dock station Windows (7, 64-bit) complains 'Device can perform faster', using laptop's port doesnt trigger the message.
USB 3.0 driver is installed.
BIOS version is 1.37.
Intel Chipset drivers are updated.
Device manager shows the connection as a chain of two 'Generic USB Hub's, if HDD is connected to the laptop's port its chain of 'Renesas Electronics USB 3.0 blah-blah'.
Please help! If this combination is just not supported, please point to the relevant link.
Thank you!
Solved!
Go to Solution.

Excellent, thank you!

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