I may have experienced this issue also on bionic (18.04) with the current kernel version as of today (4.15.0-13.14).
I upgraded one affected system with "do-release-upgrade -d". After completing the upgrade and rebooting, the system froze the same way as with the affected 17.10 kernel and microcode combination. After adding "apparmor=0" to the kernel command line the boot was successful. The system has sssd. I was not able to perform further testing today. I will try to confirm tomorrow. Or maybe someone else with an affected system is able to try bionic as well? ISOs available at http://releases.ubuntu.com/18.04/ if needed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1759920 Title: intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux- image-4.13.0-37-generic) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1759920/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
