The 25MHz clock generated by the clock generator (SYSCLK_CLK25M_CAMERA from U1900 on an 820-3437) can cause it to crash if the clock generator itself is defective or if there is an issue on its power rail, such as a burnt resistor (R2042 on an 820-3437). sudo apt install git curl build-essential git clone https://github.com/patjak/facetimehd-firmware cd facetimehd-firmware make sudo mkdir /lib/firmware/facetimehd sudo cp firmware.bin /lib/firmware/facetimehd git clone https://github.com/patjak/bcwc_pcie cd bcwc_pcie make sudo make install sudo depmod sudo rmmod bdc_pci Here is an example of an error, this one is related to RAM but it was in fact caused by the BCM15700 controller itself (which includes the framebuffer RAM controller):