Interface is USB 2.0. Tested with PureOS Byzantium KDE amd64 ISO from 2022-02-22.

idProduct field in lsusb is the empty string; this h-node entry uses the iProduct field as a substitute pending a resolution to h-node Issue 406.

Requires manual configuration:

1. Blacklist udlfb driver to work around Debian Bug 1011986: echo "blacklist udlfb" | sudo tee /etc/modprobe.d/displaylink.conf
2. sudo apt install arandr
3. Reboot the PC.
4. Connect display to USB device.
5. Connect USB device to PC.
6. xrandr --setprovideroutputsource 1 0
7. ARandR will now show a new DVI-I-1-1 output.
8. Activate that new output in ARandR.

Some hardware functionality, e.g. 24-bit color depth and Huffman compression, is not supported with free drivers (but works fine with non-free drivers). Full 1920x1080 resolution works fine. Sometimes, hotplugging will crash X11. I only had success with X11; Wayland only gave me a black screen on the DisplayLink output (maybe there's a Wayland incantation I don't know about).

This device contains non-free firmware running on an 8051/MCS-51 core. This firmware is not loaded by the host, so it doesn't violate GNU FSDG, but it may be objectionable to users who are stricter on firmware freedom than FSF is.

$ sudo lsusb -v
Bus 002 Device 004: ID 17e9:02ee DisplayLink VGA Display Adapter 
Device Descriptor: 
  bLength                18 
  bDescriptorType         1 
  bcdUSB               2.00 
  bDeviceClass            0  
  bDeviceSubClass         0  
  bDeviceProtocol         0  
  bMaxPacketSize0        64 
  idVendor           0x17e9 DisplayLink 
  idProduct          0x02ee  
  bcdDevice            1.03 
  iManufacturer           1 DisplayLink 
  iProduct                2 VGA Display Adapter 
  iSerial                 3 855181 
  bNumConfigurations      1 
  Configuration Descriptor: 
    bLength                 9 
    bDescriptorType         2 
    wTotalLength       0x0042 
    bNumInterfaces          1 
    bConfigurationValue     1 
    iConfiguration          0  
    bmAttributes         0x80 
      (Bus Powered) 
    MaxPower              500mA 
    Interface Descriptor: 
      bLength                 9 
      bDescriptorType         4 
      bInterfaceNumber        0 
      bAlternateSetting       0 
      bNumEndpoints           3 
      bInterfaceClass       255 Vendor Specific Class 
      bInterfaceSubClass      0  
      bInterfaceProtocol      0  
      iInterface              0  
      ** UNRECOGNIZED:  1b 5f 01 00 19 05 00 01 03 00 04 04 01 00 03 d0 00 02 04 00 bd 1f 00 01 04 01 02 
      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            3 
          Transfer Type            Interrupt 
          Synch Type               None 
          Usage Type               Data 
        wMaxPacketSize     0x0008  1x 8 bytes 
        bInterval               4 
      Endpoint Descriptor: 
        bLength                 7 
        bDescriptorType         5 
        bEndpointAddress     0x0a  EP 10 OUT 
        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  
  bDeviceSubClass         0  
  bDeviceProtocol         0  
  bMaxPacketSize0        64 
  bNumConfigurations      1 
can't get debug descriptor: Resource temporarily unavailable 
Device Status:     0x0000 
  (Bus Powered)