Public bug reported:
I am running Linux Ubuntu 16.04 LTS, and I've discussed in a thread at
'Ask Ubuntu: System update almost broke the system' about the Kernel Bug
— as suggested by a local user boddhi.zazen — that I experienced as I
was running my system updates. The problem occurs with "Ubuntu, with
Linux 4.4.0-39 generic", although I am still able to access Ubuntu with
the older "Ubuntu, with Linux 4.4.0-38 generic" via "+Advanced options
for Ubuntu".
Here's what happened:
1. I first ran the upgrade procedures through terminal as usual: sudo apt-get
update, sudo apt-get upgrade, sudo apt-get autoremove, and sudo apt-get
autoremove
2. However, I was told that "4 not upgraded", so I decided to run Software
Updater as well, and there was indeed updates available concerning "Ubuntu
base". I installed those successfully, and decided to proceed with restart my
system.
After the restart, my system doesn't start though. Instead, I receive
the following error message:
<-- THE BEGINNING, NOT PART OF THE ERROR MESSAGE -->
[ 1.452270] genirq: Flags mismatch irq 0. 00000080 (nvme0q0) vs. 00015a00
(timer)
[ 1.452551] iounmap: bad address ffffc90001b88000
Scanning for Btrfs filesystems
Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait for the right device?)
- Check root= (did the system wait for the right device?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT! UUID=a5ccaf22-ffde-44c2-8c59-84a851f9fd90 does not exist. Dropping to
shell!
BusyBox v1.222.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs)
<-- THE END, NOT PART OF THE ERROR MESSAGE -->
I was able to recover my system through the "+Advanced options for
Ubuntu", which I opened after. There I had total of nine choices, three
options for each version. I first tried the "recovery version" of the
latest one, but it didn't work. After that, I tried the "generic
version" of the second latest, and — thank God — that one managed to
recover my system! I believe the package is called linux-
image-4.4.0-39-generic ("Ubuntu, with Linux 4.4.0-38 generic" in the
menu")
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.16
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CrashDB: ubuntu
Date: Mon Oct 3 16:19:33 2016
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1629880
Title:
Ubuntu won't launch after the Ubuntu, with Linux 4.4.0-39 generic
update
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