Ubuntu 14.04 crashes on upgrade to 16.04

[Pilot6]

I have Ubuntu 14.04.4 with 'wily' HWE stack. File system i btrfs.

Whed I try to upgrade to wily, the systym crashes.

I get a black screen. I can't get to tty and Alt+SysRq+REISUB does not reboot the system.

After a hard reboot the system does not boot either to 4.4 or 4.2 kernels.
Not with systemd or upstart.

Regarding btrfs, it does not have any errors and all snapshots can be restored.

I saved a shapshot of the crashed system and I can provide any requested logs. Now I reported from a restored system.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 4.2.0-30.36~14.04.1-generic 4.2.8-ckt3
Uname: Linux 4.2.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Mar 12 20:08:14 2016
InstallationDate: Installed on 2016-02-29 (11 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)

[Pilot6 (hanipouspilot)]

The attached logs are from the crashed system.

[Pilot6 (hanipouspilot)]

It looks like the upgrade process can't install kernel properly on btrfs.

I booted with LiveUSB, chrooted to the system and finished by

dpkg --configure -a
apt-get install -f

[Brian Murray (brian-murray)]

I don't see any dpkg failures in apt-term.log, what leads you to believe its an issue installing the kernel?

[Pilot6 (hanipouspilot)]

Some of kernel packages did not finish the install. The command I mentioned installed some of the kernel image packages, and configured lots of other packages. There was no initrd after the first attempt.

I did that again on a different computer and got the same result. The upgrade interrupts at some point and can be continued only with a new boot.

[Giuseppe (gnocera)]

I confirm that upgrade process (from 14.04 to 16.04) crashed on my laptop LENOVO G410 like Pilot6 said.

I also booted with livecd 16.04, then chrooted to the system. In my case I did also execute
fsck /dev/sda1
That was because my first partition ended up with a lot of INODE problems.

Finally I was able to reboot Ubuntu 16.04 with GUI.

There is more...
I ran dpkg --configure -a

When I tried to do this
apt-get install -f
at the first time I was not able to execute, because there was broken packages. Ubuntu offer the option to open with SYNAPTIC, so I did with Synaptic.

At the end finally
apt-get install -f
again
_____________________________

No part of this problem but at the end of the day I notice 16.04 is tooooo slow to boot.

I did
systemd-analyze blame

I see a lot of packages with execution time bigger than 15 seconds

I double check any swap problem it seems to be everything OK.
_________________________

Ubuntu 16.04 is working, fortunately I didn't lost any personal file, but it was hard and long to rescue.