Experiment support for the Canon PIXMA iP2820 was added in version 5.2.11 of Gutenprint. This version of Gutenprint first appeared in Debian 9 Stretch and Trisquel 8 Flidas.

• Anything below ~16mm from the bottom of a Letter size page gets consistently cut off in my tests. I can print as close as 4mm to the left and right sides of the page and as close as ~3.5mm to the top of the page.
• Ink level reporting does not work.

According to the printer test page the PPD file in use is STP00079.PPD.

Bus 002 Device 005: ID 04a9:10e4 Canon, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x04a9 Canon, Inc.
  idProduct          0x10e4 
  bcdDevice            1.01
  iManufacturer           1 Canon
  iProduct                2 iP2800 series
  iSerial                 3 D3F190
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         7 Printer
      bInterfaceSubClass      1 Printer
      bInterfaceProtocol      2 Bidirectional
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

05: USB 00.0: 10900 Printer
  [Created at usb.122]
  Unique ID: JPTW.WhDyV5klE05
  Parent ID: FKGF.0j9+vWlqL56
  SysFS ID: /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0
  SysFS BusID: 2-1.3:1.0
  Hardware Class: printer
  Model: "Canon iP2800 series"
  Hotplug: USB
  Vendor: usb 0x04a9 "Canon"
  Device: usb 0x10e4 "iP2800 series"
  Revision: "1.01"
  Serial ID: "D3F190"
  Driver: "usblp"
  Driver Modules: "usblp"
  Speed: 480 Mbps
  Module Alias: "usb:v04A9p10E4d0101dc00dsc00dp00ic07isc01ip02in00"
  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: #11 (Hub)