https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195745

--- Comment #2 from rdun...@smallcatbrain.com ---
I compiled ehci and xhci as modules.
I was able to duplicate the usb disconnect after 6h:52m uptime.

Dec  6 17:25:21 <kern.crit> smp5 kernel: ukbd0: at uhub4, port 8, addr 3
(disconnected)
Dec  6 17:25:21 <kern.crit> smp5 kernel: ums0: at uhub4, port 8, addr 3
(disconnected)
Dec  6 17:25:21 <user.notice> smp5 devd: Executing '/etc/rc.d/syscons
setkeyboard /dev/kbd0'
Dec  6 17:25:21 <user.notice> smp5 devd: Executing '/etc/rc.d/moused stop ums0'
Dec  6 17:25:24 <kern.crit> smp5 kernel: usbd_req_re_enumerate: addr=3, set
address failed! (USB_ERR_TIMEOUT, ignored)
Dec  6 17:25:30 <kern.crit> smp5 kernel: usbd_setup_device_desc: getting device
descriptor at addr 3 failed, USB_ERR_TIMEOUT
Dec  6 17:25:32 <kern.crit> smp5 kernel: usbd_req_re_enumerate: addr=3, set
address failed! (USB_ERR_TIMEOUT, ignored)
Dec  6 17:25:38 <kern.crit> smp5 kernel: usbd_setup_device_desc: getting device
descriptor at addr 3 failed, USB_ERR_TIMEOUT

I did kldunload and kldload on ehci.ko

The keyboard and mouse were then functioning again.

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