Public bug reported: I tried to use do-release-upgrade to go from 14.04 to 16.04; instead the upgrade crashed, I was left with a somewhat functional box that thought it was on 16.04, yet still suggested I upgrade to 16.04.
Possibly relevant factors - The system being upgraded was a virtual machine, running on Xen (the extra-cost Citrix version).In particular it announces itself as "Citrix XenServer Host 7.0.0-125380c" - When do-release-upgrade suggested that upgrading over ssh was a bad idea, I chose to run do-release-upgrade from the Xencenter console - The system had docker installed, from a non-ubuntu apt repository. Behaviour seen: - the upgrade got a long way - perhaps 2 hours before I went home - the mess I found on the console in the morning suggested the upgrade had been asking me for input, but screen had malfunctioned in some way, putting me in a shell window with no answer expected. I'm afraid I didn't have the sense to take a screenshot of the console (which has no scrollback), and I deleted the VM to make space to install 16.04 from scratch, before deciding I really ought to file a bug, so I have very few details for you. However, if I'm right that the cause is basic incompatibility between some aspect of Xen (probably the Xencenter console) and do-release- upgrade, it should be trivially replicable. Also worth knowing - naive attempts to install either 14.04 or 16.04 on this version of Xen don't work, thanks to some Citrix issue(s). See https://unyield.com/server-management/installing-ubuntu-14-04-on- xenserver-6-5-via-url-install-guide/ or http://virantha.com/2014/05/21/ubuntu-14-04-trusty-on-xenserver-62/ for the work-around required. And finally, I believe that the Xencenter "console" device is a poor emulation of normal console behaviour. I would be totally unsurprised if the root cause of my failure is an attempt to use a tty feature that doesn't quite work right on xen. ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1653784 Title: do-release-upgrade failure on Xencenter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1653784/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
