AOC E2251FWU 22″ DisplayLink USB Monitor

[don't bury the lede]

Question: But will it work with Linux?
Answer: No.  [2012-12-28] It does not; it does not “work on Linux.”   It might, but it does not “just work” on Fedora 17.  You get a green screen, but nothing else (nothing in randr, nothing in /var/log/messages.  There is folklore that if you turn off kernel modesetting then something good happens.   This device still does not “work on Linux.”   Without further hacking, tricking or development.

Products

Product Images

E1649FWU










Source: The Gadgeteer circa 2012-06.

Features

E2251FWU

  • Viewable Image Size => 21.5″ (16:9)
  • Response Time => 5ms
  • Optimum Resolution => 1920 x 1080 @ 60Hz
  • Colors Supported => > 16 Million
  • Digital Input => USB
  • ENERGY STAR � Compliant => Yes
  • EPEAT Rated => Yes

E1649FWU

  • 16-inch LED-backlit screen
  • 1366 x 768 at 60 Hz; ratio of 16:9
  • Accelerometer detects panel rotation
  • USB connection supplies both video and power
  • DisplayLink DL-125 Connector
  • Linux support is “available” on standard distributions (claimed elsewhere)

And Again …

  • Panel:  TFT Active Matrix LCD, WLED Backlight
  • Viewable Image Size: 15.6″ (16:9)
  • Maximum Resolution: 1366 x768 @ 60Hz
  • Colors Supported: > 16 Million
  • Digital Input: USB
  • Brightness (typical): 200 cd/m2
  • Contrast Ratio: 500:1
  • Response Time: 16ms
  • Built-in Stereo Speakers: No
  • ENERGY STAR Compliant: Yes
  • Dimensions / weight: 14.8×9.3×1.4   in /  2.3 lbs

Linux & Fedora

Question: But will it work with Linux?
Answer: [2012-212-28] It does not.  It does not “work on Linux.”   It might, but it does not “just work” on Fedora 17.  You get a green screen, but nothing else (nothing in randr, nothing in /var/log/messages.  There is folklore that if you turn off kernel modesetting then something good happens.   This device still does not “work on Linux.”   Without further hacking, tricking or development.

  • Bernie Thompson; DisplayLink USB Devices on Linux Kernel 3.4.0; In Pluggable; 2012-06-21.
    • Linux kernel 3.4.0 is the first to include a new driver for DisplayLink-based USB 2.0 devices.
    • Something about problems with kernel 3.4.0 and the wrong driver being loaded; a remediation is proposed.
      echo "blacklist udl" | sudo tee --append /etc/modprobe.d/udlfb.conf
      sudo depmod -a
      sudo dracut -f /boot/initramfs-$(uname -r).img $(uname -r)
    • Driver is udl
      • udl is a port of the udlfb driver to Linux’s DRM architecture
      • David Airlie is doing this work.
    • Lots of other comments recite kernel panics and other remediations for Fedora 17 and the kernel 3.4.x series

Availabilities

Promotions

DisplayLink

Product Names & Trade Dressing

  • DL-165
  • USB 2.0 to VGA DVI HDMI Multi-Display Graphic Adapter
  • Digitech UDB2.0 to DVI Adapter

Experiences

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