Package: src:linuxVersion: 4.5.3-2Severity: importantSystem type: Lenovo X230 Distro: Debian Testing
When the firewall service, nftables is enabled via systemd, kernel 4.5.3-2 does not load giving errors described in bug # 823543 and bug # 819673 -- which were reported for kernels 4.5.1 and 4.4.6 (kernel 4.3 is the only one that works with nftables service enabled).
sudo systemctl disable nftables.service
allows kernel 4.5.3 to boot normally.