Better linux support
Better linux support, updated drivers, Fedora support (that means distributing an RPM)
Fix the issue where closing X for the first time means that the devices are no longer recognized by xrandr
Fix the slowness disparity between running it in linux and running it in windows
windows = no lag
linux = lag
Improve your linux drivers.
Thanks for the feedback. The Ubuntu release is provided to give the tools to be able to port to other Linux flavours.
An RPM has already been created and available here: http://nothen.com.ar/en/support-for-displaylink-adapters-on-linux/
We would be happy for the community to maintain packages for other Linux variants, based off the DisplayLink Ubuntu package.
The issues you are seeing with stability and performance are more due to the X system. DisplayLink do not intend to start changing the Linux OS to address these issues.
The performance is slower than Windows due to the way we get screen update changes. A change on any screen makes all pixels update on all screens, giving us many pixels to encode and send over USB. If the Linux graphics subsystem just notified of the areas of the screen which had changed, this would minimise the changes needed to be encoded by DisplayLink and remove the lag, making it comparable with Windows.
Chris Lord commented
"If the Linux graphics subsystem just notified of the areas of the screen which had changed, this would minimise the changes needed to be encoded by DisplayLink and remove the lag, making it comparable with Windows."
+1 for Fedora / more recent Linux support. Even better if the necessary drivers could be merged upstream.
D. Charles Pyle commented
The above driver you suggested for Fedora fails on Fedora 24. It installs but the scriptlets fail and the kernel module isn't built because of another failure. The best I can hope for is that I actually see the startup screen on the DisplayLink device, until I get to X, and then it goes black. That is on Fedora 24. I cannot even use the device on Ubuntu. I have to blacklist the driver on Ubuntu because the entire Xserver is abysmally slow when the device is hooked up. I also lose acceleration for the entire Xserver and it reverts to software rendering. I don't have time to wait a few seconds before each application launches on my main screen, or wait for things to happen when I have to do something and have a deadline. That is on Ubuntu 16.04 LTS. I have three monitors, two of which are Dell 2440L monitors (hooked up via HDMI to an ASUSTek Radeon HD5750 Formula graphics card running at 700 MHz with memory clock running at 1150 MHz), and the other (the one hooked up to the DisplayLink device) is a Viewsonic VX922. It works fine on Windows and Mac OS X but I have yet to see a Linux distribution on which this device works. The device itself is a Sabrent USB-DH88. I am waiting for a replacement device because this USB-DH88 device for some reason came in a UGA-2K-195 box. I get bad flickering and very, very slow responsiveness on all monitors in Ubuntu. I have yet to get it to work in Fedora or any other distribution.
Jiri Machacek commented
Guys (those posting just in-constructive negative feedback), what about to replace complaining with something constructive and helpful to help to fix issues in the driver by posting your comments containing setup information, configuration etc? Hardware of the dongles is apparently working fine, just the driver needs tuning which requires time... So far the device is resting in my drawer, from time to time I try new driver and see some progress.
Jiri Machacek commented
I have updated to your Linux driver from May 16. My chip is DisplayLink DL-165. It worked wonderfully and very smoothly until I restarted Ubuntu (16.04). After that the performance decreased heavily, all screens were refreshing very slowly, mouse glitching. I think there is some step performed during installation which "turns something on" in the driver, which causes it to run much faster. Is it possible to enforce this "nice feature" somehow via system configuration on boot-up? I would even be happy if system booted a little bit longer if I could really use this external screen dongle. Right now I can use it but I need to re-install every time to make it work smoothly.
Another new user complaining on the quality of the driver for linux. Pixelation, sluggishness, changes in appearance ...
Ubuntu 14.04LTS here with latest drivers from webpage.
What DisplayLink is doing with their seemingly existing Linux driver and/or support, is just a huge discrase for their company.
The OpenSource thing with evdi is just a bad joke. You are just hiding behind your encryption.
DisplayLink should really think about if they really want Linux Support or just seemingly doing so, so that the commnuity will do "YOUR" work, but that can only be done if "EVERYTHING" is Open Sourced.
So think about if you want to loose a lot of Linux community or you have to greatly improve your Linux support and driver development.
I just need to look at Windows driver reelases compared to linux driver releases... This shows everything.
Andreas Balg commented
I'm very lucky already that the Linux driver exists at all, but aside from the X-Windows problems with xrandr and stuff especially together with some other proprietary drivers (also with Intel GPUs proprietary driver ) there are still grave problems that definitely prevent the use on a production system today (Delays at boot time, need to unplug/plug the adapter to be sure it is recognized, Kernel-Support for text-console or support at boot-time, ...) in order to use it on a production system.
In the end accessible source code and a public bug-tracker would definitely make sense if DisplayLink cares about native support and real usability in Linux - probably there is hardly any way around that. It could even take load from your internal developers - W'd be able to help for sure with quite some issues through experienced deleopers from the community
Kopax Anderson commented
Is it too much to ask if you could write me a Debian 8 driver that can make me use of full HD ?
Unofficial drivers sucks, and 230€ for this screen is overpriced for this quality.
I am really disappointed with the performance under linux. My mouse crawls miserably on the screen. My dell computer is under kubuntu 14.04.03, is there a hope that it works better for one day?
Why don't you just integrate your drivers into the Linux kernel? Why force users to install separate packages, just to get your hardware to work? That's how things worked 20 years ago on Windows, but it's not how things are supposed to work in the modern world.