I have noticed this problem on 2 machines upgraded from Ubuntu 14.04 to Ubuntu 16.04, when trying to boot the upgraded system for the first time. The really bad issue is that after timing out, the system is going to hang with messages like: [58Z?Z1.5?Z840] INFO task systemd:21547 blocked for more than 120 seconds. This is particularly bad if the system is remote.
(sysctls to consider these hangs as panics, and reboot a paniced kernel automatically end in a loop: boot -> mount problem -> hang -> reboot -> ...) Unfortunately, I was not able to find out what actually caused the mounting problem (in my case: /home and swap). Booting from CD did not reveal anything interesting (manually did fsck), and after rebooting again it worked without problems. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1463023 Title: systemd Timed out waiting for device swap and file system check Status in systemd package in Ubuntu: Invalid Bug description: My Ubuntu 15.04 did not start --or took so long that I switched back to upstart! ISSUE: (systemd during the boot) Timed out waitingfor device dev-disk-by\x2duuid-... (swap) Dependency failed for /dev/disk/by-uuid/... (swap) Dependency failed for Swap. Timed out waiting for device dev-sdaX.device (swap) Dependency failed for Swap Partition. Failed to start udev Wait for Complete Device Initialization. See "systemctl status systemd-udev-settle.service" for details. Starting File System Check on Root Device... Starting Copy rules generated while the root was ro... (1 of 2) A start job is running for File System Check on Root Device (3min 28s / no limit) ... No tainted 3.19.0-18-generic #18-Ubuntu "echo 0> /proc/sys/kernel/hung_task_timeout_secs" disables this message. INFO: task systemd-udevd:336 blocked for more than 120 seconds. ... INFO: task systemd-udevd:338 blocked for more than 120 seconds. ... INFO: task systemd-udevd:346 blocked for more than 120 seconds. ... (1 of 2) A start job is running for File System Check on Root Device (4min 3s / no limit) WORKAROUND: apt-get -qq -y install upstart-sysv # switch back to upstart http://linux.softpedia.com/blog/Ubuntu-15-04-Users-Can-Switch-Off-Systemd-and-Use-Upstart-479373.shtml P.S. don't ask me to go back to systemd-sysv... I am fine with upstart.... TECHNICAL DETAILS: $ lsb_release -r Release: 15.04 $ uname -r 3.19.0-18-generic $ sudo dmidecode -s system-product-name MacBookPro8,2 $ grep "^GRUB_CMDLINE_LINUX_DEFAULT" /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="transparent_hugepage=always intel_iommu=on acpi_irq_nobalance cgroup_enable=memory swapaccount=1 libata.force=noncq modeset=1 hybridopts=ON,IGD,OFF i915.modeset=0 radeon.modeset=1 radeon.dpm=1 radeon.audio=1 i915.lvds_channels=2 quirks.mbp_force_ahci=1 acpi_backlight=vendor reboot=pci" $ cat /etc/fstab # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda5 during installation UUID=6619a7e9-4b94-4e9b-8dbe-4110f89dde74 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda6 during installation UUID=813e9dc2-c678-4959-ac89-e6660f886942 none swap sw 0 0 # lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT sda ├─sda1 vfat EFI 67E3-17ED ├─sda2 hfsplus Macintosh HD 2ba5bbc1-fff0-36ea-ade4-140386274279 ├─sda3 hfsplus Recovery HD 9e776f16-ceb4-37e6-b4ce-4e75c1db5444 ├─sda4 ├─sda5 ext4 6619a7e9-4b94-4e9b-8dbe-4110f89dde74 / └─sda6 swap 813e9dc2-c678-4959-ac89-e6660f886942 [SWAP] sr0 # blkid /dev/sda1: LABEL="EFI" UUID="67E3-17ED" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="5d71ff71-9843-473d-90e7-4c780c8a494d" /dev/sda2: UUID="2ba5bbc1-fff0-36ea-ade4-140386274279" LABEL="Macintosh HD" TYPE="hfsplus" PARTLABEL="Macintosh HD" PARTUUID="4e4c2249-24f8-4229-9325-d4aafd7ac093" /dev/sda3: UUID="9e776f16-ceb4-37e6-b4ce-4e75c1db5444" LABEL="Recovery HD" TYPE="hfsplus" PARTLABEL="Recovery HD" PARTUUID="a986e3e1-ed3b-44bb-a75b-87b54434380d" /dev/sda5: UUID="6619a7e9-4b94-4e9b-8dbe-4110f89dde74" TYPE="ext4" PARTUUID="9d860cb1-1334-4f79-a07a-01b8818c4aab" /dev/sda6: UUID="813e9dc2-c678-4959-ac89-e6660f886942" TYPE="swap" PARTUUID="bf1271f6-8d51-4510-8979-666c9546f1f3" /dev/sda4: PARTUUID="2b731a42-bd29-4548-8f0e-a9889ee9486b" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1463023/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
