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I've run into various problems because my Ubuntu distro (which is the newest Ubuntu GNOME 13.10 distro) thinks it's using Ubuntu 14.04. To check this, I entered:

$ lsb_release -a

This got me:

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

However, this is NOT the Ubuntu version I am (or want to be, as for now) running.

One of the problems I'm running into is the fact that software-properties-gtk is crashing when I try to start it, and I get the error:

Sorry, Ubuntu 14.04 experienced an internal error

When I try to run software-properties-gtk in my terminal, I get:

aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Ubuntu/trusty

which is strange. Any thoughts on the matter would be greatly appreciated.

share|improve this question
Check your /etc/apt/sources.list and check if it's saucy or trusty in there. If it's saucy it should contain 'deb saucy main restricted'.... and if trusty 'deb trusty main restricted' – simbadub23 Oct 24 '13 at 17:07
Ah, I just found a solution here:… – hankruiger Oct 24 '13 at 17:10
@hankruiger Does that answer your complete question then? – Seth Oct 24 '13 at 17:13
That will make the error go away, but will not be very helpful if you did actually upgrade to trusty at some point. If you actually do have trusty packages installed, then you may already have some newer packages installed, which could potentially block any updates that may go to saucy. – dobey Oct 24 '13 at 17:37
up vote 0 down vote accepted

I had the same problem. Trying to install kali sources to ubuntu 14.04, the "lsb-release" file was modified.

I just :

gksudo gedit /etc/lsb-release

and paste the original distribution information you are using, in my case Ubuntu 14.04


I hope this help you.

share|improve this answer
Thanks! I'm sure this would've solved the problem for me as well. However, I've reinstalled my system multiple times since then and am currently using Linux Mint. I hope other people find this useful. – hankruiger Feb 25 '15 at 13:33

The only way I see is to reinstall the system. Ubuntu doesn't support downgrades between versions of Ubuntu (downgrade of individual packages, yes) the same way Debian doesn't. You must do a backup of your system and reinstall everything again.

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