Using DisplayLink USB Graphics On Ubuntu 12.04
Here's the first shot at using a USB-based DisplayLink graphics adapter with Ubuntu 12.04 LTS.
As mentioned a few days ago, Plugable gave me four of their multi-seat terminal clients to try out that they are currently offering on Kickstarter to have a $50 easy-to-use multi-seat experience. Two of the devices are the DC-125 with the DisplayLink DL-125 chipset while the other two are the UD-160-A with the DisplayLink DL-165 chipset that can output up to 1920 x 1080 over DVI or VGA.
In quickly wanting to try out one of the DC-125 USB graphics devices before leaving, I wanted to see what would happen if using the multi-seat USB device on Ubuntu 12.04. All of the work Plugable has been doing and many of the other upstream developers have benefited Fedora 17 -- that's where the multi-seat experience is seamless.
Bernie Thompson, the founder of Plugable, is the upstream maintainer of the DisplayLink FB driver in the mainline Linux kernel. This FB driver is soon going to be succeeded by the DisplayLink KMS driver. However, aside from the DisplayLink FB/KMS graphics driver and the DisplayLink DDX driver, there's also other work that goes into making this multi-seat experience a reality.
Lennart Poettering of Red Hat made systemd changes to make this multi-seat experience more streamlined, and he even considers this work to be the most awesome but least advertised feature of the Beefy Miracle. So it's known that Ubuntu 12.04 won't be a seamless Plugable multi-seat experience since they're not even touching systemd, but nevertheless I was curious about DisplayLink graphics on Ubuntu 12.04, since it does at least have the frame-buffer driver (udlfb) as part of its kernel build.
Acer AL1715 displays, which are 1280 x 1024 VGA LCD panels that I've had for the past six years. (For those that always ask when seeing photos, the dual and quad LCD stands I use are the Tyke Supply monitor stands and I highly recommend those over the more popular - and more expensive - Ergotron stands. The 17-inch Acer LCD is then clamped to the Tyke Supply dual LCD stand with a Arctic Z1 stand.)
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