Ok this was triggered by a kernel panic. Presumably to do with these unknown symbols:
[ 45.060826] vmhgfs: Unknown symbol VMCIDatagram_Send (err 0) [ 45.060924] vmhgfs: Unknown symbol VMCIDatagram_DestroyHnd (err 0) [ 45.060939] vmhgfs: Unknown symbol VMCIDatagram_CreateHnd (err 0) [ 45.759823] BUG: unable to handle kernel paging request at ffff8800db107774 [ 45.759829] IP: [<ffffffff810a5f40>] module_put+0x30/0xc0 [ 45.759837] PGD 1c06063 PUD 0 [ 45.759840] Oops: 0002 [#1] SMP [ 45.759843] CPU 3 Moving to linux. ** Summary changed: - package initramfs-tools 0.99ubuntu13.5 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 137 + package initramfs-tools 0.99ubuntu13.5 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 137 -- triggering kernel panic ** Package changed: initramfs-tools (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1472484 Title: package initramfs-tools 0.99ubuntu13.5 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 137 -- triggering kernel panic Status in linux package in Ubuntu: Confirmed Bug description: root ProblemType: Package DistroRelease: Ubuntu 12.04 Package: initramfs-tools 0.99ubuntu13.5 ProcVersionSignature: Ubuntu 3.2.0-79.115-generic 3.2.67 Uname: Linux 3.2.0-79-generic x86_64 ApportVersion: 2.0.1-0ubuntu17.8 AptOrdering: initramfs-tools: Configure Architecture: amd64 Date: Mon Jul 6 23:12:57 2015 DuplicateSignature: package:initramfs-tools:0.99ubuntu13.5:子进程 已安装 post-installation 脚本 返回了错误号 137 ErrorMessage: 子进程 已安装 post-installation 脚本 返回了错误号 137 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MarkForUpload: True PackageArchitecture: all SourcePackage: initramfs-tools Title: package initramfs-tools 0.99ubuntu13.5 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 137 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1472484/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp