usb mouse : /dev/ums0 not created ...

[Ivan Georgiev]

Hello,

I am trying to use a USB mouse on 5.1-CURRENT (compiled today from the src), 
but the /dev/ums0 is not created by the device ... Tried with and without 
ACPI - in either case the ums0 is not created.

in dmesg I see:

...
device_probe_and_attach: ums0 attach returned 6
ugen0: setting configuration index 0 failed
...

Please, let me know what to do in order to get it working.
Ivan