Public bug reported: Hi, it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow and must have been cut short. Letting it re-run its job in full eventually fixed the problem.
As I am using zfs-auto-snapshot (and ZFS-as-root), there are lots and lots of ZFS snapshots. "update-grub" tries to mount each one and times out looking for a bootable image therein. I configured apt and snap to auto-update from cron. Presumably, some kernel update triggered update- grub, which ran way longer than expected (without any user interaction) and got cut short by an unrelated reboot, therefore leaving the system without a boot entry, so that it fell back on memtest86+. Please tell me which log files you might need. (I've got them all snapshotted.) $ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 $ apt-cache policy grub2-common grub2-common: Installiert: 2.04-1ubuntu12.2 Installationskandidat: 2.04-1ubuntu12.2 Versionstabelle: *** 2.04-1ubuntu12.2 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages $ apt-cache policy zfs-auto-snapshot zfs-auto-snapshot: Installiert: 1.2.4-2 Installationskandidat: 1.2.4-2 Versionstabelle: *** 1.2.4-2 500 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages 100 /var/lib/dpkg/status $ apt-cache policy zfsutils-linux zfsutils-linux: Installiert: 0.8.1-1ubuntu14.4 Installationskandidat: 0.8.1-1ubuntu14.4 Versionstabelle: *** 0.8.1-1ubuntu14.4 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 0.8.1-1ubuntu14 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2-common 2.04-1ubuntu12.2 ProcVersionSignature: Ubuntu 5.3.0-55.49-generic 5.3.18 Uname: Linux 5.3.0-55-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 30 23:32:27 2020 InstallationDate: Installed on 2019-10-31 (212 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug eoan ** Description changed: Hi, - it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow, and letting it re-run its job in full eventually fixed the problem. + it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow and must have been cut short. Letting it re-run its job in full eventually fixed the problem. As I am using zfs-auto-snapshot (and ZFS-as-root), there are lots and lots of ZFS snapshots. "update-grub" tries to mount each one and times out looking for a bootable image therein. I configured apt and snap to auto-update from cron. Presumably, some kernel update triggered update- grub, which ran way longer than expected and got cut short by a reboot, therefore leaving the system without a boot entry, so that it fell back on memtest86+. Please tell me which log files you might need. (I've got them all snapshotted.) $ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 - $ apt-cache policy grub2-common + $ apt-cache policy grub2-common grub2-common: - Installiert: 2.04-1ubuntu12.2 - Installationskandidat: 2.04-1ubuntu12.2 - Versionstabelle: - *** 2.04-1ubuntu12.2 500 - 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages - 100 /var/lib/dpkg/status - 2.04-1ubuntu12 500 - 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages + Installiert: 2.04-1ubuntu12.2 + Installationskandidat: 2.04-1ubuntu12.2 + Versionstabelle: + *** 2.04-1ubuntu12.2 500 + 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages + 100 /var/lib/dpkg/status + 2.04-1ubuntu12 500 + 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages $ apt-cache policy zfs-auto-snapshot zfs-auto-snapshot: - Installiert: 1.2.4-2 - Installationskandidat: 1.2.4-2 - Versionstabelle: - *** 1.2.4-2 500 - 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages - 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages - 100 /var/lib/dpkg/status + Installiert: 1.2.4-2 + Installationskandidat: 1.2.4-2 + Versionstabelle: + *** 1.2.4-2 500 + 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages + 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages + 100 /var/lib/dpkg/status $ apt-cache policy zfsutils-linux zfsutils-linux: - Installiert: 0.8.1-1ubuntu14.4 - Installationskandidat: 0.8.1-1ubuntu14.4 - Versionstabelle: - *** 0.8.1-1ubuntu14.4 500 - 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages - 100 /var/lib/dpkg/status - 0.8.1-1ubuntu14 500 - 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages + Installiert: 0.8.1-1ubuntu14.4 + Installationskandidat: 0.8.1-1ubuntu14.4 + Versionstabelle: + *** 0.8.1-1ubuntu14.4 500 + 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages + 100 /var/lib/dpkg/status + 0.8.1-1ubuntu14 500 + 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2-common 2.04-1ubuntu12.2 ProcVersionSignature: Ubuntu 5.3.0-55.49-generic 5.3.18 Uname: Linux 5.3.0-55-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 30 23:32:27 2020 InstallationDate: Installed on 2019-10-31 (212 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) ProcEnviron: - TERM=xterm-256color - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=de_DE.UTF-8 - SHELL=/bin/bash + TERM=xterm-256color + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=de_DE.UTF-8 + SHELL=/bin/bash SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) ** Description changed: Hi, it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow and must have been cut short. Letting it re-run its job in full eventually fixed the problem. As I am using zfs-auto-snapshot (and ZFS-as-root), there are lots and lots of ZFS snapshots. "update-grub" tries to mount each one and times out looking for a bootable image therein. I configured apt and snap to auto-update from cron. Presumably, some kernel update triggered update- - grub, which ran way longer than expected and got cut short by a reboot, - therefore leaving the system without a boot entry, so that it fell back - on memtest86+. + grub, which ran way longer than expected (and no user interaction) and + got cut short by a reboot, therefore leaving the system without a boot + entry, so that it fell back on memtest86+. Please tell me which log files you might need. (I've got them all snapshotted.) $ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 $ apt-cache policy grub2-common grub2-common: Installiert: 2.04-1ubuntu12.2 Installationskandidat: 2.04-1ubuntu12.2 Versionstabelle: *** 2.04-1ubuntu12.2 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages $ apt-cache policy zfs-auto-snapshot zfs-auto-snapshot: Installiert: 1.2.4-2 Installationskandidat: 1.2.4-2 Versionstabelle: *** 1.2.4-2 500 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages 100 /var/lib/dpkg/status $ apt-cache policy zfsutils-linux zfsutils-linux: Installiert: 0.8.1-1ubuntu14.4 Installationskandidat: 0.8.1-1ubuntu14.4 Versionstabelle: *** 0.8.1-1ubuntu14.4 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 0.8.1-1ubuntu14 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2-common 2.04-1ubuntu12.2 ProcVersionSignature: Ubuntu 5.3.0-55.49-generic 5.3.18 Uname: Linux 5.3.0-55-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 30 23:32:27 2020 InstallationDate: Installed on 2019-10-31 (212 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) ** Description changed: Hi, it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow and must have been cut short. Letting it re-run its job in full eventually fixed the problem. As I am using zfs-auto-snapshot (and ZFS-as-root), there are lots and lots of ZFS snapshots. "update-grub" tries to mount each one and times out looking for a bootable image therein. I configured apt and snap to auto-update from cron. Presumably, some kernel update triggered update- - grub, which ran way longer than expected (and no user interaction) and - got cut short by a reboot, therefore leaving the system without a boot - entry, so that it fell back on memtest86+. + grub, which ran way longer than expected (without any user interaction) + and got cut short by a reboot, therefore leaving the system without a + boot entry, so that it fell back on memtest86+. Please tell me which log files you might need. (I've got them all snapshotted.) $ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 $ apt-cache policy grub2-common grub2-common: Installiert: 2.04-1ubuntu12.2 Installationskandidat: 2.04-1ubuntu12.2 Versionstabelle: *** 2.04-1ubuntu12.2 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages $ apt-cache policy zfs-auto-snapshot zfs-auto-snapshot: Installiert: 1.2.4-2 Installationskandidat: 1.2.4-2 Versionstabelle: *** 1.2.4-2 500 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages 100 /var/lib/dpkg/status $ apt-cache policy zfsutils-linux zfsutils-linux: Installiert: 0.8.1-1ubuntu14.4 Installationskandidat: 0.8.1-1ubuntu14.4 Versionstabelle: *** 0.8.1-1ubuntu14.4 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 0.8.1-1ubuntu14 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2-common 2.04-1ubuntu12.2 ProcVersionSignature: Ubuntu 5.3.0-55.49-generic 5.3.18 Uname: Linux 5.3.0-55-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 30 23:32:27 2020 InstallationDate: Installed on 2019-10-31 (212 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) ** Description changed: Hi, it all started when Ubuntu desktop suddenly got stuck on memtest86+ during boot, after months of reliable service. It turns out "update-grub" is extremely slow and must have been cut short. Letting it re-run its job in full eventually fixed the problem. As I am using zfs-auto-snapshot (and ZFS-as-root), there are lots and lots of ZFS snapshots. "update-grub" tries to mount each one and times out looking for a bootable image therein. I configured apt and snap to auto-update from cron. Presumably, some kernel update triggered update- grub, which ran way longer than expected (without any user interaction) - and got cut short by a reboot, therefore leaving the system without a - boot entry, so that it fell back on memtest86+. + and got cut short by an unrelated reboot, therefore leaving the system + without a boot entry, so that it fell back on memtest86+. Please tell me which log files you might need. (I've got them all snapshotted.) $ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 $ apt-cache policy grub2-common grub2-common: Installiert: 2.04-1ubuntu12.2 Installationskandidat: 2.04-1ubuntu12.2 Versionstabelle: *** 2.04-1ubuntu12.2 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages $ apt-cache policy zfs-auto-snapshot zfs-auto-snapshot: Installiert: 1.2.4-2 Installationskandidat: 1.2.4-2 Versionstabelle: *** 1.2.4-2 500 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse amd64 Packages 500 http://de.archive.ubuntu.com/ubuntu eoan/multiverse i386 Packages 100 /var/lib/dpkg/status $ apt-cache policy zfsutils-linux zfsutils-linux: Installiert: 0.8.1-1ubuntu14.4 Installationskandidat: 0.8.1-1ubuntu14.4 Versionstabelle: *** 0.8.1-1ubuntu14.4 500 500 http://de.archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages 100 /var/lib/dpkg/status 0.8.1-1ubuntu14 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2-common 2.04-1ubuntu12.2 ProcVersionSignature: Ubuntu 5.3.0-55.49-generic 5.3.18 Uname: Linux 5.3.0-55-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat May 30 23:32:27 2020 InstallationDate: Installed on 2019-10-31 (212 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1881440 Title: update-grub chokes on ZFS snapshots, causing boot stuck on memtest86+ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1881440/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
