David Farrier wrote:

> Unfortunately, trying different USB ports does not make any difference, as
> all my external USB ports belong to the same controller. Would like to try
> your other suggestion, unloading xhci_hcd and let the system fall back to
> ehci_hcd. How do I do that? I tried blacklisting xhci_hcd, following the
> instructions in the Debian Kernel Manual Chapter 6. When I rebooted,
> xhci_hcd loaded anyhow.

sudo rmmod xhci_hcd ?

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