Any idea what would be causing this?


[2017-10-17 22:52:18.355] AV2 3: No valid shares for over 1 minute, issuing a USB reset
 [2017-10-17 22:52:18.586] AV2 3 attempted reset got err:(0) LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
 [2017-10-17 22:52:19.732] AV2 3 Ava2Write usb write err:(-7) LIBUSB_ERROR_TIMEOUT
 [2017-10-17 22:52:19.956] AV2 3 attempted reset got err:(0) LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
 [2017-10-17 22:52:19.963] Avalon2: Error -4 on read in avalon_gets got 0
 [2017-10-17 22:52:19.965] AV2 3: Device disappeared, shutting down thread
 [2017-10-17 22:52:19.970] AV2 3 failure, disabling!
 [2017-10-17 22:52:25.371] Hotplug: avalon2 added AV2 4
 [2017-10-17 22:53:26.378] AV2 4: No valid shares for over 1 minute, issuing a USB reset
 [2017-10-17 22:53:26.607] AV2 4 attempted reset got err:(0) LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
 [2017-10-17 22:53:27.752] AV2 4 Ava2Write usb write err:(-7) LIBUSB_ERROR_TIMEOUT
 [2017-10-17 22:53:27.976] AV2 4 attempted reset got err:(0) LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
 [2017-10-17 22:53:27.982] Avalon2: Error -4 on read in avalon_gets got 0
 [2017-10-17 22:53:27.984] AV2 4: Device disappeared, shutting down thread
 [2017-10-17 22:53:27.989] AV2 4 failure, disabling!
 [2017-10-17 22:53:34.020] Hotplug: avalon2 added AV2 5
 [2017-10-17 22:54:36.420] AV2 5: No valid shares for over 1 minute, issuing a USB reset