Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.9 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc2 ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1636034 Title: Kernel panic - not syncing: VFS: Unable to mount root fs Status in linux package in Ubuntu: Incomplete Bug description: Got kernel panic at boot and could not reach grub using shift. Found Bug #1547559, saw this comment by Jason Straight. "Stumbled across this today while searching for a fix for a PC running 16.04 that this is happening on. I don't understand why, but editing /etc/default/grub to uncomment the line for graphical terminal fixed it. What that has to do with mounting root I don't know, but that was certainly the fix." "Uncommenting #GRUB_TERMINAL=console fixed it." Yes, it does. Not sure if this is related or not so new bug. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-45-generic 4.4.0-45.66 ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21 Uname: Linux 4.4.0-45-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: gilsr 2587 F.... pulseaudio /dev/snd/controlC1: gilsr 2587 F.... pulseaudio /dev/snd/controlC0: gilsr 2587 F.... pulseaudio CurrentDesktop: Unity Date: Sun Oct 23 19:53:47 2016 HibernationDevice: RESUME=UUID=6b783c22-05f6-4b87-8d0b-5f23d003361b InstallationDate: Installed on 2016-10-08 (15 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) IwConfig: lo no wireless extensions. eno1 no wireless extensions. ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-45-generic root=UUID=b69ab98a-b1e4-4612-a1b2-1cfb9f742265 ro rootflags=subvol=@ quiet splash RelatedPackageVersions: linux-restricted-modules-4.4.0-45-generic N/A linux-backports-modules-4.4.0-45-generic N/A linux-firmware 1.157.4 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/01/2012 dmi.bios.vendor: Intel Corp. dmi.bios.version: BHZ7710H.86A.0094.2012.1101.1115 dmi.board.name: DZ77BH-55K dmi.board.vendor: Intel Corporation dmi.board.version: AAG39008-400 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrBHZ7710H.86A.0094.2012.1101.1115:bd11/01/2012:svn:pn:pvr:rvnIntelCorporation:rnDZ77BH-55K:rvrAAG39008-400:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1636034/+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
