Public bug reported: When I tried to boot my Ubuntu machine this morning, it dropped into emergency mode.
It did the same after rebooting. Logs showed ===== Apr 03 08:16:25 mikel-study mount[961]: mount: no medium found on /dev/sr0 Apr 03 08:16:25 mikel-study systemd[1]: cdrom.mount: Mount process exited, code=exited status=32 Apr 03 08:16:25 mikel-study systemd[1]: Failed to mount /cdrom. -- Subject: Unit cdrom.mount has failed ... -- Subject: Unit local-fs.target has failed ... Apr 03 08:16:25 mikel-study systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'. Apr 03 08:16:25 mikel-study systemd[1]: local-fs.target: Triggering OnFailure= dependencies. Apr 03 08:16:25 mikel-study systemd[1]: cdrom.mount: Unit entered failed state. Apr 03 08:16:25 mikel-study systemd[1]: Reached target Emergency Mode. -- Subject: Unit emergency.target has finished start-up ===== Removing these two final entries from /etc/fstab and rebooting solved it. /dev/dvd /dvd iso9660 ro 0 0 /dev/cdrom /cdrom iso9660 ro 0 0 Seems the same as https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1455683, but that was marked WONTFIX two years ago. Also not clear why it just started happening. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: systemd 229-4ubuntu16 ProcVersionSignature: Ubuntu 4.4.0-71.92-generic 4.4.49 Uname: Linux 4.4.0-71-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Apr 3 08:22:08 2017 InstallationDate: Installed on 2015-10-05 (545 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: System manufacturer System Product Name ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-71-generic root=UUID=991bfd06-93fc-44f2-a592-cb3014d658b5 ro quiet splash SourcePackage: systemd SystemdDelta: [EXTENDED] /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf [EXTENDED] /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf [EXTENDED] /etc/systemd/system/display-manager.service → /lib/systemd/system/display-manager.service.d/xdiagnose.conf 3 overridden configuration files found. UpgradeStatus: Upgraded to xenial on 2016-05-04 (334 days ago) dmi.bios.date: 10/21/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0703 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8Z68-V LX dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0703:bd10/21/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VLX:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1679216 Title: local-fs fails to mount cdrom, forcing emergency mode boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1679216/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
