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I don't know how, but I was upgrading from ubuntu 11.10 using:

sudo do-release-upgrade -d

Then after the upgrade and a reboot, I did:

sudo lsb_release -a

and got:

No LSB modules are available.
Distributor ID: 
Ubuntu Description:Ubuntu Trusty Tahr (development branch)
Release:        14.04
Codename:       trusty

How was this possible? Is it possible to downgrade without a rebuild? I guess I'm an alpha tester for 14.04 now?

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2  
from the man-page of do-release-upgrade: -d, --devel-release Check if upgrading to the latest devel release is possible so it exactly that and upgraded to the latest development release. –  Wouter Jan 15 at 11:42
1  
askubuntu.com/help/on-topic states questions about unreleased versions are off-topic. Bug reports about 14.04 may be filed at launchpad.net –  K7AAY Jan 15 at 11:47
    
Ah i see, doh. Bit stupid on my part. Checking if devel is available also means install it without a prompt. –  GarethAyres Jan 15 at 11:58

2 Answers 2

You have chosen to upgrade to the development version by choosing option -d in sudo do-release-upgrade -d

So, for one reason or another, you've upgraded Ubuntu to a new version. Now, you're not liking the new version (or it's a development version and too unstable for your taste).

there are mainly two methods to downgrade and since its too long to state here so please check the community help page for that by clicking here.

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The release team is enabling upgrade paths that will allow jumping between releases. I don't really know why were you using -d parameter that will leave you in the latest development version, but that's expected... I guess. I've never seen someone jumping through 7 releases, ever, but with the recent changes in the upgrade paths I should be expecting some weird cases.

There's no method to downgrade Ubuntu version, just reinstall using your prefered LTS or normal releases after doing the mandatory backups.

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