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Simple question, but searching did not return an answer.

I have a Pi4 and a Pi Camera. This camera is not USB and does not appear in lsusb output when it is working.

# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

What command to give to show if the camera is connected correctly?

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  • What OS? What Pi? What have YOU done to set it up?
    – Milliways
    Apr 9 at 23:56
  • @Milliways My question is trying to be generic. In MY case I found I must have tugged the cable and partially pulled it from the onboard socket. However the question remains, mostly to assist future searchers in solving their problem.
    – Criggie
    Apr 10 at 0:46
  • In which case the Question is useless - indeed worse than useless, it is misleading due to the changed camera stack in Bullseye which most users will have.
    – Milliways
    Apr 10 at 0:57
  • @Milliways feel free to answer and/or downvote, or flag as appropriate then. Or if the answer exists in another question, flag as a duplicate.
    – Criggie
    Apr 10 at 1:03

2 Answers 2

2

Most likely at this point in time you will need to run libcamera-hello to see if the camera is working.

Docs: https://www.raspberrypi.com/documentation/accessories/camera.html

Most examples are going to have you open sudo raspi-config and enable the legacy camera features. That's a good option if you are a beginner. However, there are a lot of ways to record images and videos with your pi/camera.

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  • This host is running octoprint, and libcamera-hello is not installed. I'm specifically looking for command to show if the pi camera is connected/detected
    – Criggie
    Apr 9 at 23:40
  • ...had to install libcamera-apps to get this. Looks like its not Picamera specific either, mine finds a USB-connected camera at /dev/video0 which is correct.
    – Criggie
    Apr 9 at 23:51
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There is nothing in dmesg to show whether the camera was detected or not.


Not connected/detected:

# raspistill -o output.jpg
mmal: Cannot read camera info, keeping the defaults for OV5647
mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)
mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)
mmal: Failed to create camera component
mmal: main: Failed to create camera component
mmal: Camera is not detected. Please check carefully the camera module is installed correctly

Connected OK:

# raspistill -o output.jpg

# echo $?
0

# ll output.jpg 
-rw-r--r-- 1 root root 1672456 Apr 10 12:40 output.jpg

And there's a jpeg file created which is a valid snap from the picam.

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