I'm having multiple issues with the same dock. Most annoying is random disconnect loop, which requires restarting the dock. Not sure which firmware it has. Answer from PerkyPangolin on reddit.com
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Reddit
reddit.com › r/thinkpad › issues with usb-c dock gen2 40as0090eu - firmware downgrade possible?
r/thinkpad on Reddit: Issues with USB-C Dock Gen2 40AS0090EU - firmware downgrade possible?
January 29, 2021 -

Customer complains about issues with his new Thinkpad E15 Gen2 with USB-C Dock Gen2 ( 40AS0090EU). After login, displays stay black and nothing works until he removes and plug in the USB-C cable. After some hours, the same thing happens again.

We have bought two docks and with both of them, the problems happens. We switched the USB-C cable, same problem happen.

However, for 1-2 days we have used the dock from another employee which has an older firmware. There were no issues with it. Maybe there are some problems with the newest firmware?

Current firmware is V1.0.6.06161 from Juny 2020. I don't find any link to an archive or older firmware. Where can I get the older firmware and is it even possible to downgrade?

https://download.lenovo.com/consumer/options/thinkpad_usb-c_dock_gen2_fw_v10606161.txt

Any other tips about this? It seems we are not the only people who have this kind of issues with this dock. However, there are other employees with Thinkpads and USB-C Dock Gen2 where everything works fine.

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Reddit
reddit.com › r/thinkpad › lenovo have taken down the firmware for the thinkpad usb-c gen 2 dock
r/thinkpad on Reddit: Lenovo have taken down the firmware for the ThinkPad USB-C Gen 2 Dock
January 12, 2025 -

It seems as if Lenovo has removed the firmware for the USB-C Gen 2 dock. https://pcsupport.lenovo.com/gb/en/accessories/acc500106

The support page is still up, however scrolling down to Drivers and Software, and then clicking the firmware button provides the following link:

http://pcsupport.lenovo.com/us/en/downloads/DS539092

This redirects to a page not found.

Is anyone aware of where to find the firmware for the dock? This is pretty frustrating!

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Reddit
reddit.com › r/thinkpad › no way to force a firmware re-flash with lenovo for usb-c gen 2 docks?
r/thinkpad on Reddit: No way to force a firmware re-flash with Lenovo for USB-C Gen 2 docks?
June 9, 2022 -

We started having issues popping up randomly where users in our offices reported a loss of video through their Lenovo USB-C "Gen 2" docks. After a bunch of reading of Lenovo's forums, it sounds like this has been going on for at least a couple years now.

Their dock firmware does the update in several sections, launching different utilities in sub-folders from a batch file or main "launcher" application. And if any one piece fails, it results in the dock reporting it successfully updated to the current version -- but part of it is non-functional.

I believe our issue stems from certain versions of the Intel integrated video drivers on our mix of Lenovo notebooks causing conflicts with their updater.

Lenovo's responses to these issues seem less than helpful. Basically, they just tell people to RMA the docks. (All of ours are out of warranty already.)

Has anyone found a way to force the Lenovo firmware updater to re-flash a dock without checking its version first? A "/force" type option seems like such a basic thing, and can't believe Lenovo doesn't support it somehow?

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Lenovo Community
forums.lenovo.com › t5 › ThinkPad-P-and-W-Series-Mobile-Workstations › How-To-RollBack-Firmware-on-Lenovo-Gen2-DockingStation › m-p › 5094855
How-To-RollBack-Firmware-on-Lenovo-Gen2 ...
August 20, 2021 - Welcome to Lenovo and Motorola community. If the website doesn't work properly without JavaScript enabled. Please enable it to continue
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Reddit
reddit.com › r/thinkpad › usb-c gen 2 dock firmware update
r/thinkpad on Reddit: Usb-c gen 2 dock firmware update
March 29, 2023 - PSA: Lenovo finally fixed the 40AS USB Type C Gen 2 dock, bye-bye black screens! P14s / T14 / X13 / T14s AMD owners don't have to suffer anymore! ... IBM and Lenovo ThinkPad laptop enthusiasts! ... How to downgrade older firmware on TB3 gen 2 dock?
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Lenovo Community
forums.lenovo.com › t5 › Displays-Options-and-Accessories › Undo-dock-firmware-update › m-p › 5236081
Undo-dock-firmware-update - English Community - LENOVO COMMUNITY
July 5, 2023 - According this reddit thread, to downgrade the dock firmware you just download the older firmware (if it is still available), and run the .exe in it. To check if there is an older firmware available, search for ThinkPad Universal USB-C Dock firmware on pcsupport.lenovo.com.
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Lenovo Community
forums.lenovo.com › t5 › Displays-Options-and-Accessories › ThinkPad-USB-C-Dock-Gen-2-Firmware-upgrade-failed-Update-DP-hub-FW-Fail › m-p › 5231661
ThinkPad-USB-C-Dock-Gen-2-Firmware-upgrade-failed-Update-DP-hub-FW-Fail - English Community - LENOVO COMMUNITY
June 16, 2023 - Current USB hub version is the same, no need to update. Current Audio codec version is the same, no need to update. Estimated it will take 00 minute(s) and 48 second(s) for Firmware update progress · Start to update DP hub FW... Update DP hub FW...Fail · PD Billboard update timeout, please remove all devices from the dock and reboot computer to try again.