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pi@raspberrypi:~ $ dmesg | grep cma
[ 0.000000] cma: Reserved 256 MiB at 0x000000001ec00000
If it reports less than 96MB assigned to CMA, then please '''''edit /boot/cmdline.txt'''''as following: sudo nano /boot/cmdline.txt and addthen add <code>cma=96M</code> to the start of the line. Do NOT add any carriage returns.
5. Reboot. sudo reboot If all is well you should get a /dev/video0 device, and "v4l2-ctl --list-devices" will tell you that it is provided by Unicam.
After connecting all the cables, power on the Raspberry Pi, the C779/C790 indicator light is normally green, and after opening the Raspberry Pi terminal, enter the following command:
<pre>