Here's the top of the most recent logs where things appear to go wrong.  The log data I posted initially is more where things stop working.  I'm going to unplug the hub to see if that solves the problem.  And I'll see if I can test a newer kernel.

Nov 25 11:53:44 snake kernel: [18708.164897] usb 3-1: USB disconnect, device number 2
Nov 25 11:53:44 snake kernel: [18708.164910] usb 3-1.4: USB disconnect, device number 5
Nov 25 11:53:44 snake colord: device removed: sysfs-317GAWCM001LON2AS1ST-USB_Video_device
Nov 25 11:53:44 snake kernel: [18708.331928] usb 4-1: USB disconnect, device number 2
Nov 25 11:53:44 snake kernel: [18708.332195] usb 4-1: Set SEL for device-initiated U1 failed.
Nov 25 11:53:44 snake kernel: [18708.332201] usb 4-1: Set SEL for device-initiated U2 failed.
Nov 25 11:53:45 snake kernel: [18709.387650] usb 4-1: new SuperSpeed USB device number 3 using xhci_hcd
Nov 25 11:53:45 snake kernel: [18709.405680] usb 4-1: New USB device found, idVendor=2109, idProduct=8110
Nov 25 11:53:45 snake kernel: [18709.405690] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Nov 25 11:53:45 snake kernel: [18709.405695] usb 4-1: Product: USB 3.0 HUB
Nov 25 11:53:45 snake kernel: [18709.405695]       
Nov 25 11:53:45 snake kernel: [18709.405700] usb 4-1: Manufacturer: VLI Labs, Inc. 
Nov 25 11:53:45 snake kernel: [18709.407594] hub 4-1:1.0: USB hub found
Nov 25 11:53:45 snake kernel: [18709.407720] hub 4-1:1.0: 4 ports detected
Nov 25 11:53:45 snake kernel: [18709.647434] usb 3-1: new high-speed USB device number 9 using xhci_hcd
Nov 25 11:53:45 snake kernel: [18709.665557] usb 3-1: New USB device found, idVendor=2109, idProduct=2811
Nov 25 11:53:45 snake kernel: [18709.665566] usb 3-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
Nov 25 11:53:45 snake kernel: [18709.665571] usb 3-1: Product: USB 2.0 HUB
Nov 25 11:53:45 snake kernel: [18709.665571]       
Nov 25 11:53:45 snake kernel: [18709.666438] hub 3-1:1.0: USB hub found
Nov 25 11:53:45 snake kernel: [18709.666697] hub 3-1:1.0: 4 ports detected
Nov 25 11:53:46 snake kernel: [18709.955410] usb 3-1.4: new high-speed USB device number 10 using xhci_hcd
Nov 25 11:53:46 snake kernel: [18710.538596] usb 3-1.4: Device not responding to set address.
Nov 25 11:53:46 snake kernel: [18710.739134] usb 3-1.4: Device not responding to set address.
Nov 25 11:53:47 snake kernel: [18710.942888] usb 3-1.4: device not accepting address 10, error -71
Nov 25 11:53:47 snake kernel: [18711.182972] usb 3-1.4: new high-speed USB device number 12 using xhci_hcd
Nov 25 11:53:47 snake kernel: [18711.313242] usb 3-1.4: New USB device found, idVendor=0bda, idProduct=58fe
Nov 25 11:53:47 snake kernel: [18711.313252] usb 3-1.4: New USB device strings: Mfr=3, Product=1, SerialNumber=2
Nov 25 11:53:47 snake kernel: [18711.313257] usb 3-1.4: Product: USB Video device
Nov 25 11:53:47 snake kernel: [18711.313261] usb 3-1.4: Manufacturer: 317GAWCM001LON2AS1ST
Nov 25 11:53:47 snake kernel: [18711.313265] usb 3-1.4: SerialNumber: 200901010001
Nov 25 11:53:47 snake kernel: [18711.317310] uvcvideo: Found UVC 1.00 device USB Video device (0bda:58fe)
Nov 25 11:53:47 snake kernel: [18711.329069] input: USB Video device as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.4/3-1.4:1.0/input/input16
Nov 25 11:53:47 snake mtp-probe: checking bus 3, device 12: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.4"
Nov 25 11:53:47 snake mtp-probe: bus: 3, device: 12 was not an MTP device
Nov 25 11:53:47 snake colord: Device added: sysfs-317GAWCM001LON2AS1ST-USB_Video_device
Nov 25 11:53:47 snake rtkit-daemon[1592]: Successfully made thread 8208 of process 2408 (n/a) owned by '1000' RT at priority 5.
Nov 25 11:53:47 snake rtkit-daemon[1592]: Supervising 5 threads of 1 processes of 1 users.