This error appeared two weeks ago when using the camera module. I searched on the internet and came to a conclusion that my Raspberry Pi camera module was defective.

I just received another camera module, earthed myself and connected it to RPi but the same error appeared, namely:

mmal received unexpected camera control callback event

I'm really frustrated, I have a project on RPi need to be done this Tuesday :( Help please

1 Answer 1


try this tutorial [ https://github.com/raspberrypi/linux/issues/435 ].

the most common problem is that the 1-wire module overwrite the gpio function selection for the I2C pins.

verify that :

ensure that i2c-bcm2708 is blacklisted in your /etc/modprobe.d/raspi-blacklist.conf (uncomment it if commented)

blacklist spi-bcm2708
blacklist i2c-bcm2708

The modules are in this order in your /etc/modules

  • I did the changes in the second file /modules (already found them blacklisted in the fisrt one) now i'm getting these errors: mmal: mmal_vc_component_enable: failed to enable component: ENOSPC mmal: camera component couldn't be enabled mmal: main: Failed to create camera component mmal: Failed to run camera app. Please check for firmware updates
    – DieDen
    May 16, 2014 at 18:00
  • you know, I have the same problem, and I tried to fix it for 2 months, people that follows this answer said that it works fine, but not for me. so I decided to return the camera to the store, sorry
    – user14306
    May 16, 2014 at 18:02
  • as i mentioned above i did get a new camera module with the same frustrating result! i'm afraid that its a csi problem in the RPi board :( thanks anyway
    – DieDen
    May 16, 2014 at 18:07

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.