Hi, I have a problem with my XPS 9360 and a Lenovo Thunderbolt 3 dock (40AC) - the dock works perfectly well on my Thinkpad, but does not connect at all to my XPS, only charges the laptop.
It seems to be a BIOS issue, because every time I upgrade or downgrade the BIOS (I'm currently on 2.7.1), the dock springs to life after the step "USB PD controller 1" with everything plugged into the dock working. Once I plug it out and back in, the dock does not reconnect - maybe the controller restarting makes a link to the dock?
In Device Manager, the devices "Thunderbolt HSM Controller", "Thunderbolt Toast Controller" and "Thunderbolt Controller - 1575" are always disabled with code 45 (device couldn't start due to an error) unless I did the above procedure. The dock also isn't detected in Thunderbolt Software.
Things I tried:
- Moving from Windows 11 to Windows 10
- Different drivers and TB software
- Different BIOS (pretty much every version 2.7 - 2.18)
- Different BIOS settings
- BIOS diagnostics
- Dell diagnostics
- Setting the WiFi controller power output to 75%
- Hard reset with battery unplug
- Messing with the driver .inf files in devmgmt
- Updating TB firmware
... and pretty much anything available as advice on the internet
Has anyone been able to fix this issue, or am I SOL?