sudo modprobe v4l2loopback modprobe: ERROR: could not insert 'v4l2loopback': Bad address

Question

When I follow the steps of Using a digital camera ( Canon) as webcam

My linux is Ubuntu 18.04

I have an error with the following command :

sudo modprobe v4l2loopback
modprobe: ERROR: could not insert 'v4l2loopback': Bad address

I found nothing at this moment on the internet.

Could u help me ?

Eric

I only found this tag, surely a mistake. I corrected it – Eric Reboisson Jul 31 '20 at 15:58 — Eric Reboisson, Jul 31 '20 at 15:58

score 15 · Accepted Answer · edited Aug 04 '20 at 21:59

15

I had the same thing (followed a similar guide for DSLR) and I ended up compiling the v4l2loopback module and installing it. Now everything works perfectly.

Make sure to remove the original package installation with sudo apt-get remove v4l2loopback-dkms

Now follow the GitHub instructions on how to compile and install the module (really easy, clone and see the install section). https://github.com/umlaeute/v4l2loopback

edited Aug 04 '20 at 21:59

Abhay Patil

2,705

answered Aug 03 '20 at 22:03

shlomicthailand

266
2
3

thx u , I finally succeed to make it works by removing, compiling and installing it – Eric Reboisson Aug 10 '20 at 10:26
@EricReboisson - so vote the answer :-) – shlomicthailand Aug 10 '20 at 16:27
3

I tried this and am still getting the original issue. – John Dee Sep 26 '20 at 01:12

score 11 · Answer 2 · answered Aug 26 '20 at 22:25

When using iriun for turning your iPhone cam into a webcam, the same error occured to me on Ubuntu 18.04, as it brings v4l2loopback-dkms as a dependency. So I had to first uninstall the package and its dependencies.

sudo apt purge v4l2loopback-dkms

Compiling the module is indeed getting rid of the error.

git clone https://github.com/umlaeute/v4l2loopback.git
cd v4l2loopback
make
sudo su
make install

After install the command: sudo modprobe v4l2loopback exclusive_caps=1 works without issues. But to get iriun to work, I had to do these addition steps:

Install iriun without 4l2loopback-dkms dependency:

sudo dpkg -i --ignore-depends=4l2loopback-dkms iriunwebcam.deb

Fix dependency in /var/lib/dpkg/status
Search for iriun, and remove 4l2loopback-dkms from Depends:

Package: iriunwebcam
Status: install ok installed
Maintainer: Iriun
Architecture: all
Version: 2.2
Depends: qt5-default, jackd, adb
Description: Iriun Webcam for Linux

You could also alter the dependency in the iriunwebcam.deb file, but this way seemed easier to me. Now iriun works great for me.

Nice solution, it worked for me, but after some time (and probably some updates) iriun stopped work and the same issue started happening again. I will follow again this tutorial and try to fix this again. — matgaio, Apr 16 '21 at 21:27
This question and these answers were really helpful to get Iriun back working for me. Wish I could do more than just upvote. Here's an Ansible role that installs Iriun for Ubuntu 18.04, now updated thanks to your contributions. https://codeberg.org/ansible/iriun-webcam — solarchemist, May 24 '21 at 23:04

sudo modprobe v4l2loopback modprobe: ERROR: could not insert 'v4l2loopback': Bad address

2 Answers2