This question arises in a lot of variants and so I got a lot of hints how I could solve my issue - but until now nothing really worked for me.

At first I tried to use cheese as supposed in various posts. But instead of a picture is appearing cheese only says No device found.

Then I used camorama and here I received this message

enter image description here

And now I followed this "tutorial" and because the path /dev/video0 is missing. Finally I have to follow the instructions under the section Troubleshooting

  • I have to use hwinfo --usb to find my webcam and the needed Driver Activation Cmd line to continue the process
  • But with hwinfo --usb or hwinfo --pci or sudo lshw|fgrep -i cam
  • or simply lsusb or lspci -vv

I couldn't find anything proper - in my opinion. I mention this explicitly because I'm still new to ubuntu.

Okay that's my research until now... do you have some hints how I can solve this issue? Many thanks in advance!

Note: I'm using Ubuntu 18.04 bionic and my laptop is an HP Z Book 15 G3 with an inbuilt Webcam: 720 p HD Webcam

Additional note:

enter image description here

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When I enter sudo hwinfo --usb I get the following image

enter image description here

1 Answer 1


Add yourself to the group that /dev/video0 belongs too.

The group will be video so do a

sudo usermod -a -G video $USER

The command groups should show you have video added to your groups.

That will give you access to the device.

  • Can you please name the steps I have to take? I just entered in the terminal the sudo usermod -a -G video $USER command and nothing changed... for USER I tried also my name...
    – tueftla
    Nov 25, 2020 at 10:14
  • Relog your user in.
    – nobody
    Nov 25, 2020 at 10:18
  • @nobody: Okay, after relogging I'm in the group video but still it doesn't work. I have also verified if /dev/video0 exits - it's still missing. How can I create this path proper?
    – tueftla
    Nov 25, 2020 at 10:26
  • check for /dev/video* It might not be 0 on your system :)
    – Rinzwind
    Nov 25, 2020 at 11:53
  • 1
    @starkus: Until now not... I will search and when I find a solution I will post it here.
    – tueftla
    Dec 15, 2020 at 16:08

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