Public bug reported: Started with Ubuntu Version 14.04 I always had SecureBoot enabled and also CSM (compatibility support module) enabled in BIOS of Motherboard ASUS Z170-A, BIOS 3802 03/15/2018. On October, 13th i did the updates that UpdateManager showed in the morning.
After rebooting in the evening, afterwards the BIOS splash screen there was only a black screen. No grub menu, no booting in SecureBoot mode. I tried different repairs (tool boot-repair, reinstalling grub, installing signed kernel transitional packages and so on, but nothing would help. At the end I found out out, that switching CSM to disabled "solved" the problem and it is now reproducible: Switching CSM on, no secure boot, switching off, secure boot works. But I did not wont to switch CSM off. I also tried to get some help at ubuntuforum. But no luck. See here https://ubuntuforums.org/showthread.php?t=2404150 Since today I think it's a bug in shim or grub, because at the morning of Oct, 13th these have been updated. Regards Frank ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.27 ProcVersionSignature: Ubuntu 4.15.0-38.41-lowlatency 4.15.18 Uname: Linux 4.15.0-38-lowlatency x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: XFCE Date: Wed Oct 24 20:36:17 2018 InstallationDate: Installed on 2016-04-03 (933 days ago) InstallationMedia: Ubuntu-Studio 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1) PackageArchitecture: all ProcEnviron: LANGUAGE=de_DE PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: ubuntu-release-upgrader Symptom: release-upgrade UpgradeStatus: Upgraded to bionic on 2018-09-24 (30 days ago) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799767 Title: grub menu not showing with SecureBoot enabled after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1799767/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
