Your problem was that you hadn't installed titans updated fcam drivers after up upgraded kernel-power to >v42 (from extras-devel, somewhere you should clearly not be going)

Your solution is to re-flash just the kernel.

You will loose nothing except kernel-power.

Once your phone is up and running again, disable extras-devel, then install advanced linux kernel for power users, and settings v42 which should be in extras-testing.

Do not enable extras-devel until you are comfortable with the possible outcome, i.e. having to reflash.