HWE Kernel in xenial-testing resolves the issue as well
/proc/version_signature
Ubuntu 4.13.0-39.44~16.04.1-generic 4.13.16
/proc/cmdline
BOOT_IMAGE=/@/boot/vmlinuz-4.13.0-39-generic
root=UUID=7dcb6f6f-1069-4315-a421-0d60fffecef9 ro rootflags=subvol=@
dmesg -t | grep -i microcode
microcode:
Can confirm test kernal fixed my hard lock issue as well:
/proc/version_signature
Ubuntu 4.13.0-38.43+lp1759920.1-generic 4.13.16
/proc/cmdline
BOOT_IMAGE=/@/boot/vmlinuz-4.13.0-38-generic
root=UUID=7dcb6f6f-1069-4315-a421-0d60fffecef9 ro rootflags=subvol=@
dmesg -t | grep -i microcode
