How to install/activate logitech webcam c270 on Ubuntu 18.04?

I do have an inbuiltwebcam in my laptop, but I ve bought one Logitech c270 for my college project purpose. Everytime I m trying to open my externally added webcam, it starts the inbuilt webcam. How to enable my external webcam in my laptop having ubuntu 18.04?? plse help

2 Answers

It depends on your program.

I am like cheese f.ex. just install with:
sudo apt install cheese

Than take a look how it works with:
cheese --help
[...]
-d, --device=DEVICE Device to use as a camera
[...]

(--help or -h should work with any program. If you're in any GUI search for 'Help' in the menu bar)

All possible devices can be seen with ls -ltrh /dev/video* and it starts with 0 (your internal cam). The external cam should be available with:
cheese -d /dev/video1 (of course depending on the other system configurations)

• If this is too much, just disable the internal cam in your Laptop BIOS (the steps depends on your device).
• If you'd like to have a cool solution, may you'd like to write an udev-rule for the permanent reorder.
• Something in between is to find and unload the kernel driver ... but this needs to have two different camera chips/drivers. And when you'll start to write in /etc/modprobe.d/ (for example in blacklist), it could be easier for us to support the udev-thing.

You can confirm with lsusb that it doesn't need to be installed.

On Ubuntu 21.04 I plugged the c270 Logitech camera in. Then checked that it was mounted:

$ lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 007: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 003 Device 005: ID 04f2:b724 Chicony Electronics Co., Ltd Integrated
...

Then, in Zoom and Slack, in preferences and video set up it allows you to choose which camera from a pull down. In both programs, my camera was one of the choices.