[Bug 1544904] [NEW] Updating 15.10 to 16.04 alpha2 failed: subprocess exit status 127

[Launchpad Bug Tracker]

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Hi,

just some testing feedback:

I yesterday tried to update a Xubuntu 15.10 64bit (latest update status)
to 16.04 alpha2 with update-manager -d, which went wrong and aborted
(not a  problem, was just a virtual testing machine and I made a
snapshot before upgrading, can jump back to the state before updating
with a mouse click).

Within the upgrade process, several packages failed and complained like

  got an error from dpkg for pkg: 'install-info': 'subprocess installed
post-installation script returned an error exit status 127'


Lots of these messages, also for gconf2, util-linux, initscripts, sgml-base, systemd, systemd-sysv, e2fsprogs, hostname,...


Unfortunately, no further details, not even in the upgrade logs, just lots of messages like this, just with different package names.  


These problems (seems to be the same problem for all) caused an avalanche of uninstallable packages due to dependencies, and finally caused update-manager to abort half-way. Especially systemd could not be properly installed. Now  I have a (more or less) running system somewhere in the middle between 15.10 and 16.04.  (I mean: Wow. Which OS would still boot and work in important aspect when stuck in the middle of an upgrade?) 

However: As far as I can see there is a single problem causing this exit
status 127, common in many post-installation scripts, which makes the
upgrade process crash completely.

regards

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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Updating 15.10 to 16.04 alpha2 failed: subprocess exit status 127
https://bugs.launchpad.net/bugs/1544904
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