How to fix Raspi camera 'failed to open vchiq instance'


You are trying to access the Raspberry Pi camera using raspistill or raspivid. Although you already enabled the camera interface using raspi-config, you see this error message:

* failed to open vchiq instance


Your user does not have the permissions to access the camera interface. As a quick fix, you can run raspistill or raspivid as root using sudo, or add your user to the video group to acquire the required permissions:

sudo usermod -a -G video $USER

After doing this, log out and log back in again for the changes to take effect - or close your SSH session and connect again. If in doubt, try to reboot.