Shotwell makes USB mouse flaky. Apparently it does some form of USB polling.
[ 3824.324968] usb 1-4.3: USB disconnect, address 120
[ 3824.532107] usb 1-4.3: new low speed USB device using ehci_hcd and address 121
[ 3824.629588] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3824.634145] input: Mitsumi Electric Apple Optical USB Mouse as /devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.3/1-4.3:1.0/input/input122
[ 3824.634260] apple 0003:05AC:0304.0077: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000:00:1d.7-4.3/input0
[ 3825.604935] usb 1-4.3: USB disconnect, address 121
[ 3825.808189] usb 1-4.3: new low speed USB device using ehci_hcd and address 122
[ 3825.906054] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3825.908963] input: Mitsumi Electric Apple Optical USB Mouse as /devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.3/1-4.3:1.0/input/input123
[ 3825.909080] apple 0003:05AC:0304.0078: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000:00:1d.7-4.3/input0
[ 3826.884900] usb 1-4.3: USB disconnect, address 122
[ 3827.088163] usb 1-4.3: new low speed USB device using ehci_hcd and address 123
[ 3827.186019] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3827.190038] input: Mitsumi Electric Apple Optical USB Mouse as /devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.3/1-4.3:1.0/input/input124
[ 3827.190153] apple 0003:05AC:0304.0079: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000:00:1d.7-4.3/input0
Binary package hint: shotwell
Shotwell makes USB mouse flaky. Apparently it does some form of USB polling.
[ 3824.324968] usb 1-4.3: USB disconnect, address 120 pci0000: 00/0000: 00:1d.7/ usb1/1- 4/1-4.3/ 1-4.3:1. 0/input/ input122 0304.0077: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000: 00:1d.7- 4.3/input0 pci0000: 00/0000: 00:1d.7/ usb1/1- 4/1-4.3/ 1-4.3:1. 0/input/ input123 0304.0078: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000: 00:1d.7- 4.3/input0 pci0000: 00/0000: 00:1d.7/ usb1/1- 4/1-4.3/ 1-4.3:1. 0/input/ input124 0304.0079: input,hidraw3: USB HID v1.10 Mouse [Mitsumi Electric Apple Optical USB Mouse] on usb-0000: 00:1d.7- 4.3/input0
[ 3824.532107] usb 1-4.3: new low speed USB device using ehci_hcd and address 121
[ 3824.629588] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3824.634145] input: Mitsumi Electric Apple Optical USB Mouse as /devices/
[ 3824.634260] apple 0003:05AC:
[ 3825.604935] usb 1-4.3: USB disconnect, address 121
[ 3825.808189] usb 1-4.3: new low speed USB device using ehci_hcd and address 122
[ 3825.906054] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3825.908963] input: Mitsumi Electric Apple Optical USB Mouse as /devices/
[ 3825.909080] apple 0003:05AC:
[ 3826.884900] usb 1-4.3: USB disconnect, address 122
[ 3827.088163] usb 1-4.3: new low speed USB device using ehci_hcd and address 123
[ 3827.186019] usb 1-4.3: configuration #1 chosen from 1 choice
[ 3827.190038] input: Mitsumi Electric Apple Optical USB Mouse as /devices/
[ 3827.190153] apple 0003:05AC: