Your query is kind of confusing (I think you said USB 3.0 where your meant USB 2.0 in at least one place) but I will attempt to answer it...
- Every USB 3.0 port has a full USB 2.0 port built into it and, if a USB 2.0 device is plugged into a USB 3.0 port, only the internal USB 2.0 port is used. That is, the USB 3.0 port automatically downgrades itself to support the USB 2.0 device.
- Plugging a USB 2.0 hub into the USB 3.0 port and then plugging the USB 2.0 device into this hub accomplished nothing (well, other than adding an additional point of contention and potential failure). I believe that you should just plug this TV Tuner directly into the NUC (though, if the TV Tuner's driver has issues with USB 3.0, this may still bite you).
- You can disable xHCI Mode in the BIOS (Select Advanced then Devices then USB (tab) and then set parameter xHCI Mode to Disabled), but I am not sure this will accomplish anything [Edit: and I believe it disables it for all USB 3.0 ports].
- The internal USB 2.0 ports in the NUC are actually behind an internal USB 3.0 router, so using them would, I belive, still leave you open to the driver issues.
Hope this helps,
Hi N. Scott,
Thanks for your hints. Yes, I meant "... these external USB 2.0 TV cards have trouble collaborating with USB 3.0 ...". I removed the USB 2.0 hub, and I plugged in the external USB 2.0 TV card directly into one of the regular USB-Ports at the backside of the NUC. I didn't disable the xHCI Mode in the BIOS, because this would affect all USB-Ports (as far as I found out), and I have two USB 3.0 devices. I re-installed the driver of the TV tuner, and - again - one error occured within the events:
<Translated from German> „Device not migrated“
The device "USB\VID_0B48&PID_300D\LHKBGF" couldn't be migrated.
ID of the last device instance: USB\VID_14F7&PID_0003\0008C9D923F9
Persistance Location Path:
Migration Rank (Sequence): 0xF000FFFF0000F122
Any idea? Except this error message, the device seems to work properly.
Thanks, and kind regards,
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The only way to use USB 3.0 as USB 2.0 will be just like Scott mentioned previously, disable xHCI Mode in the BIOS (Select Advanced then Devices then USB (tab) and then set parameter xHCI Mode to Disabled), but again, this will disable USB 3.0 features to all ports.