I connected my printer with mouse and get this message
Mar 1 22:47:46 localhost kernel: usb 2-3: New USB device found, idVendor=04a9, idProduct=2676
Mar 1 22:47:46 localhost kernel: usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 1 22:47:46 localhost kernel: usb 2-3: Product: Canon CAPT USB Device
Mar 1 22:47:46 localhost kernel: usb 2-3: Manufacturer: Canon
Mar 1 22:47:46 localhost kernel: usb 2-3: SerialNumber: 0000A255S2B5
Mar 1 22:47:46 localhost mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-3"
Mar 1 22:47:46 localhost mtp-probe: bus: 2, device: 5 was not an MTP device
Mar 1 22:47:47 localhost kernel: usblp1: USB Bidirectional printer dev 5 if 0 alt 0 proto 2 vid 0x04A9 pid 0x2676
Mar 1 22:47:47 localhost kernel: usbcore: registered new interface driver usblp
Mar 1 22:47:49 localhost kernel: usb 2-3: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
Then I unplugged my mouse and get working printer and this one
Mar 1 22:51:48 localhost kernel: usb 2-3: New USB device found, idVendor=04a9, idProduct=2676
Mar 1 22:51:48 localhost kernel: usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 1 22:51:48 localhost kernel: usb 2-3: Product: Canon CAPT USB Device
Mar 1 22:51:48 localhost kernel: usb 2-3: Manufacturer: Canon
Mar 1 22:51:48 localhost kernel: usb 2-3: SerialNumber: 0000A255S2B5
Mar 1 22:51:48 localhost kernel: usblp0: USB Bidirectional printer dev 8 if 0 alt 0 proto 2 vid 0x04A9 pid 0x2676
Mar 1 22:51:48 localhost mtp-probe: checking bus 2, device 8: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-3"
Mar 1 22:51:48 localhost mtp-probe: bus: 2, device: 8 was not an MTP device
Mar 1 22:51:50 localhost kernel: usb 2-3: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
Mar 1 22:51:50 localhost udev-configure-printer: no corresponding CUPS device found
P.S. You asked me how did I get error messages, captstatusui -P. After printer connection I use that and check printer status. And, by the way, after I get working printer I can plug and unplug printer's usb and it's work. The taking off mouse's usb before you connect printer works like reset for him