Upgrade 12.0 -> 12.1: USB not working

After doing binary upgrade to 12.1 my USB seems to have stopped working:

Code:
uhub_reattach_port: could not allocate new device
usb_alloc_device: set address 3 failed (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
ugen1.3: <Unknown > at usbus1 (disconnected)
uhub_reattach_port: could not allocate new device
usb_alloc_device: set address 3 failed (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
ugen1.3: <Unknown > at usbus1 (disconnected)
uhub_reattach_port: could not allocate new device
usb_alloc_device: set address 3 failed (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED

Log is full of that stuff, new lines every minute.

I have tried restarting and plugging to different USB port, no effect.

The mainboard is MSI B75MAP45 (s1155) + Core i5-3570 CPU. So B75 Chipset.

I have upgrade other machine, where is Z77 chipset, no problems there.
 
Try a different port, try a different medium, what messages do you get from that? I seen a few hits on this error form 2008 and 2014 and such.
 
After updating to 12.1-RELEASE-p2 USB started working again!

So something WAS wrong and it has now been fixed!
 
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