Surface Dock keeps disconnecting/reconnecting USB devices with Surface Book 2

I have the same issue.

Razer keyboard keeps disconnecting and reconnecting while connected to dock and playing a game.

C'mon Microsoft - this cost me close to $5,000 for surface book 2, pen and dock. 

Pretty unacceptable that this dock behaves like this. I'd expect that from some cheap Chinese knockoff - not a Microsoft branded premium product like the surface book and dock.

Note that when connecting the devices directly to the Surface Book, they don't disconnect.

If I only connect the keyboard (2 USB ports) to the Surface Book and the mouse (1 USB port) to the Surface Dock, only the mouse disconnects.

Note that monitors don't disconnect.

Reinstalling Nvidia and Intel USB hub drivers did not solve the problem since they were already up to date for me. Simply reinstalling them made no difference. 

What made things a bit better for me is to go to Device Manager -> USB controllers and find all the "Generic USB Hub devices"

For each of those devices, you want to check and see that on their "Details" page they have the hardware ID as VID = 045E (Microsoft) and PID =0901, 0902, etc... to make sure they are one of the USB hub ports on the Surface Dock.

For each of these devices, I went to their Power Management tab and unchecked the box that says "Allow the computer to turn off this device to save power".

This seems to help because now I have fewer disconnections, but doesn't solve the problem entirely. I might have missed a root device or something else. 

The reason I'm looking in this area is because I noticed that the times when I'm seeing USB disconnecting seems to be when my Surface device is really stressed on performance, mostly when playing some games that has the CPU and GPU running near their limits, fan's going full blast and the computer's still getting warmer. It seems like when the system is thermal throttling, it decides to turn off power to the USB devices and disconnect your keyboard and mouse because as a side effect? What the hell. 

From this observation, I don't think spending money to buying a Surface Dock 2 would actually solve the problem if my suspicion is right -- this is a software configuration issue, not a hardware defect. Windows device drivers are being overly aggressive in trying to manage power and turned off devices that is detrimental to the user's experience. 

I advise everybody with this problem to experiment with the "Allow the computer to turn off this device to save power", particularly on the "Intel(R) USB 3.0 eXtensible-Hostcontroller". I use a different dock (Dell USB-C display) and had very very similar problems and it was this setting that fixed it for me. Try that before you get new hardware.

I solved my surface dock2 mouse disconnection problem. For me, it has something to do with my power supply: I plugged my surface dock2 into a power strip, which only provides 250w power while I also plugged in other equipments on that. Solved by plug my surface dock2 directly into a wall plug

Alex,

I had this same issue on my surface pro 7 with the surface dock. Any iPhone or iPad or Android phone which was drawing power from the USB port kept disconnecting and re-connecting again. Extremely irritating for the last 2 months.

Today I disabled all USB controllers and then uninstalled them. Where the OS asked, if I wanted to delete the driver, I selected yes. In particular I had an entry for "Standard USB 3.0 eXtensible Host Controller". Once uninstalled, i was asked to reboot. 

Its been a number of hours since having all devices including my headset, mobile, keyboard, iPad and monitor connected with no issues at all.

Give this a go. The funny thing is the particular controller mentioned above didnt re-install itself post reboot and all seems well.

Good Luck

Immy