The -proposed kernel should be kernel 4.4.0-52.73. Can you run sudo apt-get update again?
If you still don't get the kernel, it can be downloaded directly from: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/11278866
The -proposed kernel should be kernel 4.4.0-52.73. Can you run sudo apt-get update again?
If you still don't get the kernel, it can be downloaded directly from: /launchpad. net/~canonical- kernel- team/+archive/ ubuntu/ ppa/+build/ 11278866
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