STM32F4Discovery - STLink on Latitude 3540

[juvann]

I recently bought a Latitude 3540 but the STLinkv2 on my STM32F4Discovery is not detected. I have linux in dmesg I can't see nothing also errors are missing, many other USB periphericals are working. I tried also on Windows and no errors and no detect. It's seem as I don't attach nothing. I tried to use an external hub and is working.
Someone has the same problem?

Thank you

[pickit2]

I would say it's the ports or the drivers on the laptop, way to many discovery boards sold and this is not posted as an issue.
As it is working in external hub, it is most likely the port is stuck in low power out mode, so limited supply, check your usb voltage under load, with kit you are using.