It works at 90% with libre software.

dmesg

[  915.642952] usb 1-2: new high-speed USB device number 6 using ehci-pci
[  915.668485] usb 1-2: New USB device found, idVendor=04a9, idProduct=173a, bcdDevice= 0.02
[  915.668488] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  915.668490] usb 1-2: Product: MP250 series
[  915.668492] usb 1-2: Manufacturer: Canon
[  915.668494] usb 1-2: SerialNumber: 83759E
[  915.671736] usblp 1-2:1.1: usblp0: USB Bidirectional printer dev 6 if 1 alt 0 proto 2 vid 0x04A9 pid 0x173A

hwinfo --printer

13: USB 00.1: 10900 Printer                                     
  [Created at usb.122]
  Unique ID: 3X50.Zu00XHTJvd9
  Parent ID: k4bc.9T1GDCLyFd9
  SysFS ID: /devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.1
  SysFS BusID: 1-2:1.1
  Hardware Class: printer
  Model: "Canon PIXMA MP250"
  Hotplug: USB
  Vendor: usb 0x04a9 "Canon"
  Device: usb 0x173a "PIXMA MP250"
  Revision: "0.02"
  Serial ID: "83759E"
  Driver: "usblp"
  Driver Modules: "usblp"
  Speed: 480 Mbps
  Module Alias: "usb:v04A9p173Ad0002dc00dsc00dp00ic07isc01ip02in01"
  Driver Info #0:
    Driver Status: usblp is active
    Driver Activation Cmd: "modprobe usblp"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #14 (Hub)