Kernel panic - not syncing:Fatal exception in interrupt

[Fibonacci]

I've just installed Kubuntu 15.04 and was able to boot into it once and update the kernel. Since then, everytime I try to boot into it I get the following error message:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

There might be other error messages before but I cannot see them as they pass too fast, and the only messages I see are those shown in the attached picture.

After some trial and error, I've discovered that this bug occurs when booting with the quiet option. When I remove it, the kernel boots fine most of the time (not everytime, but it's a definite improvement).

What's happening and how do I prevent it?

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-22-generic 3.19.0-22.22
ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
Uname: Linux 3.19.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: fibonacci 1816 F.... pulseaudio
 /dev/snd/pcmC0D0p: fibonacci 1816 F...m pulseaudio
 /dev/snd/controlC0: fibonacci 1816 F.... pulseaudio
CurrentDesktop: KDE
Date: Sat Jul 18 20:28:31 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=7e89a62d-4e77-40fc-89ba-42c3b1e76fc0
InstallationDate: Installed on 2015-07-13 (5 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.19.0-22-generic root=UUID=0e051a2e-be67-40a6-8d32-29d4de69aca1 ro rootflags=subvol=@ splash
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-22-generic N/A
 linux-backports-modules-3.19.0-22-generic N/A
 linux-firmware 1.143.1
RfKill:

SourcePackage: linux
UdevLog: Error: [Errno 2] File o directory non esistente: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/04/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BLH6710H.86A.0160.2012.1204.1156
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH67BL
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG10189-206
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrBLH6710H.86A.0160.2012.1204.1156:bd12/04/2012:svn:pn:pvr:rvnIntelCorporation:rnDH67BL:rvrAAG10189-206:cvn:ct3:cvr:

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

The 15.10 kernel has been rebased to v4.0. Can you get the system to boot, then apply the latest updates and see if this bug still exists?

[Fibonacci (fibonacci-prower)]

If you mean 15.04 then yes, it still exists.

[Erik Zoltan (erikzoltan)]

I have a 64-bit System76 computer and this problem also affects me. My kernel is 3.19.0-22-generic. I am using factory-installed Ubuntu 15.04, but I've been running updates regularly.

I can still boot my original 3.19.0-21-generic kernel just fine, and do my work on that kernel without any problems.

[Erik Zoltan (erikzoltan)]

Correction: on further review my problem seems to be slightly different, and I will log it separately.

[penalvch (penalvch)]

Fibonacci, are you able to boot into a prior kernel version via GRUB that doesn't demonstrate this problem?

[Fibonacci (fibonacci-prower)]

Not at all. This is a clean install so the earliest kernel version is 3.19.0-15 which has this bug.

[Fibonacci (fibonacci-prower)]

I've installed kernel 3.19.0-25, and now it's not enough to remove the quiet option even in 3.19.0-22. I have to manually edit the grub menu entry at boot time (writing it on grub.cfg doesn't work) and replace the following lines:

                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 0e051a2e-be67-40a6-8d32-29d4de69aca1
                else
                  search --no-floppy --fs-uuid --set=root 0e051a2e-be67-40a6-8d32-29d4de69aca1
                fi

with this:

                  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 0e051a2e-be67-40a6-8d32-29d4de69aca1

That is true also for the newest kernel – if I don't do that, I get the kernel panic message I described before.

[Erik Zoltan (erikzoltan)]

I am attaching a screen shot of my problem because it looks so similar and I haven't had any luck in solving it. I can still boot with the Linux 3.19.0-21-generic kernel from the Grub menu. However the more recent versions (22 through 25) are not booting. I am not sure how to tell for certain but it looks more and more like the same kind of problem.