This issue is not limited to EC2. I'm running artful on a Dell Optiplex 5040 with an i5-6500 CPU (which is Skylake); I've just installed sssd and hit the full system freeze. Even REISUB didn't work!
kernel 4.13.0-36-generic sssd 1.15.3-2ubuntu1 apparmor 2.11.0-2ubuntu17.1
This issue is not limited to EC2. I'm running artful on a Dell Optiplex 5040 with an i5-6500 CPU (which is Skylake); I've just installed sssd and hit the full system freeze. Even REISUB didn't work!
kernel 4.13.0-36-generic
sssd 1.15.3-2ubuntu1
apparmor 2.11.0-2ubuntu17.1