Performed latest set of updates and retested. Couldn't run apport- collect from the terminal immediately after failure as it needed a graphical book in order to authenticate via Firefox, so ran after fixing fstab and rebooting. I don't know if the logs are therefore useful?
I don't recall exactly what sequence of events lead me to the initial issue but it was likely after updates as I rarely reboot my PC otherwise. However all data in this bug report comes from a clean install in a VirtualBox VM, updates installed, then fstab modified to cause boot to fail. I will now retest with the latest kernel and report back. -- 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/1463120 Title: Failure to boot if fstab disk mounts fail Status in linux package in Ubuntu: Incomplete Bug description: I found this on my main 15.04 desktop but have reproduced it in a VM: 1. Install Ubuntu 15.04 (I included updates and non-free but I doubt that matters). 2. Add a bogus entry to /etc/fstab, eg: /dev/sdd1 /mnt/sdd1 ext4 errors=remount-ro 0 0 Note that /mnd/sdd1 exists but /dev/sdd1 does not 3. Reboot Expected: Failure to mount /dev/sdd1 reported and option to boot without mounting it Actual: System appears to hang, although it will eventually present a root terminal (with no indication of the cause of the problem). It appears to hang prior to switching graphical mode, with the result that any warnings/errors that are present on all boots but invisible because the screen clears before they're seen become visible for the first time incorrectly suggesting they are the cause of the problem. Removing (or commenting out) the problematic entries and rebooting allows the system to boot. HOWEVER: The grub boot menu now appears and any pre-existing menu timeout and default action seems to have been lost; it's now necessary to select a boot option on each boot. This may be a separate bug (or feature?). My actual case: I have external drives permanently connected via USB, however the USB card appears to have failed hence the drives are not accessible. With no clues (and being unfamiliar to systemd) working out why the system wouldn't boot was a tough job. --- ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mark 1382 F.... pulseaudio DistroRelease: Ubuntu 15.04 HibernationDevice: RESUME=UUID=76b7b79b-0cdd-4605-bc58-381fad8fa67f InstallationDate: Installed on 2015-06-08 (4 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) IwConfig: eth0 no wireless extensions. lo no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox Package: linux (not installed) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-20-generic root=UUID=53f2fcea-e84c-4736-ac69-f34305a63432 ro quiet splash ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.19.0-20-generic N/A linux-backports-modules-3.19.0-20-generic N/A linux-firmware 1.143.1 RfKill: Tags: vivid UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' Uname: Linux 3.19.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1463120/+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