I have almost the same thing by getting back to the stock kernel: these commands: apt-get install --reinstall mp-fremantle-generic-pr or apt-get install --reinstall kernel kernel-flasher will result in: Reinstallation of mp-fremantle-generic-pr is not possoble, it cannot be downloaded (same error for the second command but then with those packages names)
apt-get remove kernel kernel-flasher apt-get install mp-fremantle-generic-pr