On 06.02.2017 06:36, Roger Qiu wrote:
When you plug something in, the kernel log should show something. If it
doesn't then the kernel doesn't know about it, nothing in the userspace
can help.

How can that be?

Make sure you're running those commands before you plug the usb in.
Also I used to have faulty usb cables, but even then the kernel showed
something. Usually repeating messages because the usb cable kept
dropping out and coming back in.

What happens if you plug those devices directly?

The kernel does not notice the expresscard itself when I plug it in. My usb hard disk works perfectly under the other ports.

Ah, and fun fact: When plugging in the expresscard, I can reproducibly scramble my sound output for a second (the music repeats for a second after I plug it in). Still, the kernel says nothing. And no device nodes appear.

On 06/02/2017 2:55 PM, "Christoph-Simon Senjak"
<mailto:christoph.sen...@googlemail.com>> wrote:


    On 06.02.2017 04:46, Peter Hoeg wrote:


            My USB 3.0 Expresscard does not work under NixOS, it used to
            under other distros. I already tried to add

        Can you be a little more specific about "does not work"?

    Nothing happens. Like, really nothing. No new hub is shown in lsusb
    (as it was under Ubuntu). Devices I plug in are not shown. Nothing.

        When you plug it in, what messages are you seeing while running
        these 2
        commands in separate terminals:

        journalctl -k -f


        udevadm monitor

    Nothing. No output.

    Regards, CSS
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