On 2/28/21 11:26 AM, Carl Johnson wrote:
> I have an 8GB RPi 4B that I am trying out, but it has no USB response at
> all. That means that I can't use a keyboard or mouse, but I can use a
> serial console and ethernet.  I can plug any USB device into any port,
> but there is nothing logged in /var/messages.  Running usbconfig as root
> just reports 'No device match or lack of permissions'.  Running
> 'dmesg | grep -i usb' reports only the following lines:
> 
>   usb_nop_xceiv0: <USB NOP PHY> on ofwbus0
>   bcm_xhci0: <VL805 USB 3.0 controller (on the Raspberry Pi 4b)> irq 81 at 
> device 0.0 on pci2
>   usb_needs_explore_all: no devclass
>   
> Running 'pciconf -lv' shows there is a VL805 USB controller present.  I
> tested this with Linux and everything worked properly.  This is a new
> computer that I bought only a couple of weeks ago.  Does anybody have
> any ideas on what this might be, or what I could do to try to figure it
> out?
> 
> Thanks in advance for any ideas.
> 


Not to belabour the obvious, but have you booted the machine with Linux
to see if USB works there?  (Just to avoid the possibility that you
have bad hardware.)
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