p751tm1-g Clevo P751TM1-G vs. USB-C Dock vs. issue with USB-C ports

[dude-137]

Something strange is happening with the USB-C ports of my Clevo P751TM1-G.

 

So I ordered and received a new great USB-C dock-station, with the purpose of stop using and wearing-off the laptop's USB ports and connect all devices at once via one USB-C.

The dock is powered by a 100W USB-C adapter, so it supposed to eat 5 external HDDs simultaneously just for breakfast, and still have plenty of unused power available and unused.

 

However, there's a big issue. Every time I connect an external HDD (a more power-hungry device than external-SSD/KB/mouse/flash-pen/SD-card/etc), the dock disconnects completely, together with all connected devices. No power between the dock and the laptop's USB-C, 0V, 0W, just like it's physically disconnected (also measured with the USB-C volt/watt/ampere-meter).

So I have to re-connect the dock to the laptop to get the dock and all the connected devices back, together with the connected external HDD. Then the HDD initializes normally and everything seems alright.

I disconnect it, then connect it again, and the same issue happens again.

 

So it happens every time I connect an external HDD. With its both USB-C ports.

 

Why this situation is not the dock's fault:

I tested the dock with my friend's Lenovo T490, with the exact same USB-cables and charger, and in the same mode (without using the dock's power delivery feature).

And everything works great, the dock doesn't disconnect when the external HDD is connected to it!

 

Could something be wrong with the Clevo's USB-C ports?

I have an unlocked BIOS on it, with a crapload  of various settings and parameters, is there smth I could check there?

[dude-137]

Update:

 

Just got another laptop for testing the issue, HP ProBook 430 G5.

And like with Lenovo T490, the dock works flawlessly with it, the problem was not reproduced.

Another +1  that the problem lies in the Clevo.