Driving a monitor over USB

This forum is dedicated to basic help and support :

Ask here your questions about basic installation and usage of Mageia. For example you may post here all your questions about getting Mageia isos and installing it, configuring your printer, using your word processor etc.

Try to ask your questions in the right sub-forum with as much details as you can gather. the more precise the question will be, the more likely you are to get a useful answer

Driving a monitor over USB

Postby DiBosco » Jan 18th, '17, 12:17

Hi folks,

Friend of mine (using Windows) is able to drive several monitors over USB. I think it might be called displaylink? Is that possible with Mageia does anyone know? When doing a forum search there is no return for displaylink and display link gives various results but nothing that seems to address this problem.

If you Google it for Linux there seem to be various things for Ubuntu and in my experience if it works on Ubuntu it works on Mageia.

The Arch wiki has this:

https://wiki.archlinux.org/index.php/DisplayLink

I can see nothing in our repositories for displaylink either.

Anyone played with this? Is it possible? Impossible?

Thanks! :)
DiBosco
 
Posts: 264
Joined: Aug 31st, '11, 10:22

Re: Driving a monitor over USB

Postby duncangareth » Jan 21st, '18, 02:01

I have been looking into this issue lately. I have had some success with the Fedora displaylink package, and the evdi module sources. I found that I had to compile the evdi.ko module by hand and install it under /lib/modules/`uname -r`/drivers/evdi/evdi.ko, and then run "depmod". Then it is possible to run "modprobe evdi".

I shall be able to test the external display tomorrow when I go to the office. Also, I think one needs to run "modprobe udl" first.
duncangareth
 
Posts: 53
Joined: Oct 24th, '13, 21:05

Re: Driving a monitor over USB

Postby wintpe » Jan 22nd, '18, 12:52

I have one of these monitors as well, just a 7inch, would be interested to try what you have done as well.

regards peter
Redhat 6 Certified Engineer (RHCE)
Sometimes my posts will sound short, or snappy, however its realy not my intention to offend, so accept my apologies in advance.
wintpe
 
Posts: 1200
Joined: May 22nd, '11, 17:08
Location: Rayleigh,, Essex , UK

Re: Driving a monitor over USB

Postby JoesCat » Jan 25th, '18, 09:35

Worth mentioning for anyone interested, but never used these devices - so you know more-or-less what to expect display-wise....

I had to use something similar for work (running Windows7 at that time, evga USB device), and running into the problem of not enough deskspace to open-up all the pages I needed to see, continuous overlap and bringing pages to the front.

You need to note that the display is a bit laggy with these USB display devices, so if you are trying to run something with a high update rate like a 3D 1st-person video game, or watching a video, you'll end up a little disappointed, however, if you're doing something with a very low update rate, like a text screen or a static picture, then it appears satisfactory. For myself, it was helpful having extra displays to see work related documentation, text, etc, but you did notice the choppiness as you dragged stuff to/from/across a USB display.
User avatar
JoesCat
 
Posts: 117
Joined: Sep 15th, '11, 04:27
Location: Richmond, BC, Canada

Re: Driving a monitor over USB

Postby duncangareth » Oct 27th, '18, 09:32

It has been several months since I said I would give this a try. I have not yet succeeded in getting the device to work correctly. It works fine as an extra network port, sound output, and USB hub, but the HDMI output is giving me a bit of a hard time. If I get it right I shall post the method.
duncangareth
 
Posts: 53
Joined: Oct 24th, '13, 21:05

Re: Driving a monitor over USB

Postby tians514 » Feb 14th, '20, 02:42

duncangareth wrote:I have been looking into this issue lately. I have had some success with the Fedora displaylink package, and the evdi module sources. I found that I had to compile the evdi.ko module by hand and install it under /lib/modules/`uname -r`/drivers/evdi/evdi.ko, and then run "depmod". Then it is possible to run "modprobe evdi".

I shall be able to test the external display tomorrow when I go to the office. Also, I think one needs to run "modprobe udl" first.


I ran into the same thing. It is still very laggy (2020 now). Attempted to install the Fedora 31 RPM for 5.4 Kernel. It fails on compile of evdi module. To compile that I did the following: First the source is in /usr/src/evdi-1.6.4 (note it will change with version of evdi)

So go to the source directory.
Then do the following commands as root:
Code: Select all
# dkms add -m evdi -v 1.6.4
# dkms build -m evdi -v 1.6.4
# dkms install -m evdi -v 1.6.4


I should warn you this is probably dangerous so be careful on your main rig as this is linking to your kernel. It will likely break with a kernel upgrade as well. However, you can get the display link to work. Just expect lagginess and high cpu usage when it is in use.
Last edited by isadora on Feb 14th, '20, 10:42, edited 1 time in total.
Reason: Placed command-output in between [CODE]-tags for better readability ;)
tians514
 
Posts: 5
Joined: Jan 25th, '13, 04:41


Return to Basic support

Who is online

Users browsing this forum: No registered users and 1 guest

cron