Hi Wouter.
Output from dmesg -w (including as it may point to issues elsewhere):
[ 8893.437626] usb 1-1.1.3: new full-speed USB device number 9 using dwc_otg
[ 8893.570715] usb 1-1.1.3: New USB device found, idVendor=0403, idProduct=df31
[ 8893.570725] usb 1-1.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 8893.570729] usb 1-1.1.3: Product: ATK-16HR Camera
[ 8893.570734] usb 1-1.1.3: Manufacturer: ATIK-Instruments
[ 8893.570738] usb 1-1.1.3: SerialNumber: 00QTI3E6
[ 8893.578970] ftdi_sio 1-1.1.3:1.0: FTDI USB Serial Device converter detected
[ 8893.579088] usb 1-1.1.3: Detected FT232BM
[ 8893.579989] usb 1-1.1.3: FTDI USB Serial Device converter now attached to ttyUSB1
[ 9197.562395] usb 1-1.1.2: new high-speed USB device number 10 using dwc_otg
[ 9197.663273] usb 1-1.1.2: New USB device found, idVendor=1a40, idProduct=0101
[ 9197.663291] usb 1-1.1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 9197.663301] usb 1-1.1.2: Product: USB 2.0 Hub [MTT]
[ 9197.669717] hub 1-1.1.2:1.0: USB hub found
[ 9197.671782] hub 1-1.1.2:1.0: 4 ports detected
[ 9198.058546] usb 1-1.1.2.2: new full-speed USB device number 11 using dwc_otg
[ 9198.286218] usb 1-1.1.2.2: New USB device found, idVendor=0403, idProduct=df35
[ 9198.286236] usb 1-1.1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 9198.286246] usb 1-1.1.2.2: Product: ATK 16IC Camera
[ 9198.286256] usb 1-1.1.2.2: Manufacturer: ATIK
[ 9198.286265] usb 1-1.1.2.2: SerialNumber: A3001QH8
[ 9198.303017] ftdi_sio 1-1.1.2.2:1.0: FTDI USB Serial Device converter detected
[ 9198.303266] usb 1-1.1.2.2: Detected FT232RL
[ 9198.305447] usb 1-1.1.2.2: FTDI USB Serial Device converter now attached to ttyUSB2
[ 9198.486449] usb 1-1.1.2.4: new full-speed USB device number 12 using dwc_otg
[ 9198.688837] usb 1-1.1.2.4: New USB device found, idVendor=067b, idProduct=2303
[ 9198.688855] usb 1-1.1.2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 9198.688866] usb 1-1.1.2.4: Product: USB-Serial Controller
[ 9198.688876] usb 1-1.1.2.4: Manufacturer: Prolific Technology Inc.
[ 9198.690085] pl2303 1-1.1.2.4:1.0: pl2303 converter detected
[ 9198.702570] usb 1-1.1.2.4: pl2303 converter now attached to ttyUSB3
[ 9199.194380] Under-voltage detected! (0x00050005)
[ 9199.738339] usb 1-1.1.2.3: new full-speed USB device number 13 using dwc_otg
[ 9199.952713] usb 1-1.1.2.3: New USB device found, idVendor=1278, idProduct=0920
[ 9199.952731] usb 1-1.1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 9199.952741] usb 1-1.1.2.3: Product: SxFilterWh
[ 9199.952751] usb 1-1.1.2.3: Manufacturer: SxFilterWh
[ 9199.959423] hid-generic 0003:1278:0920.0003: hidraw0: USB HID v1.01 Device [SxFilterWh SxFilterWh] on usb-3f980000.usb-1.1.2.3/input0
[ 9203.226408] Voltage normalised (0x00000000)
[ 9210.679721] usb 1-1.1.2-port3: disabled by hub (EMI?), re-enabling...
[ 9210.679847] usb 1-1.1.2.3: USB disconnect, device number 13
[ 9211.002452] usb 1-1.1.2.3: new full-speed USB device number 14 using dwc_otg
[ 9211.217084] usb 1-1.1.2.3: New USB device found, idVendor=1278, idProduct=0920
[ 9211.217102] usb 1-1.1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 9211.217113] usb 1-1.1.2.3: Product: SxFilterWh
[ 9211.217122] usb 1-1.1.2.3: Manufacturer: SxFilterWh
[ 9211.222843] hid-generic 0003:1278:0920.0004: hidraw0: USB HID v1.01 Device [SxFilterWh SxFilterWh] on usb-3f980000.usb-1.1.2.3/input0
Output from lsusb:
Bus 001 Device 009: ID 0403:df31 Future Technology Devices International, Ltd
Bus 001 Device 012: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 001 Device 014: ID 1278:0920 Starlight Xpress
Bus 001 Device 011: ID 0403:df35 Future Technology Devices International, Ltd
Bus 001 Device 010: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 005: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub