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I've been using ubuntu for 2 years now. And every 1 or 2 days I had something to upgrade. But today it's been maybe 2 or 3 weeks since the system detected the last upgrade to do. I think something goes wrong with my Xubuntu.

What I did :
1/ in synaptic I chose the repositories : Main , universe
And I chose the "Main server" to download from.

2/ then in a terminal :

sudo apt-get update
sudo apt-get upgrade

and I always have 0 new package to install ... Do you have the same "trouble" ? It's very strange. Thanks for your help

share|improve this question
What version of Ubuntu are you using? – Tom Brossman Dec 22 '12 at 18:36

If the version you installed 2 years ago is not listed here (11.04 for example), it is no longer supported and you should update to a newer release of Ubuntu.

To find your version of Ubuntu, press Ctrl + Alt + T and type lsb_release -a then Enter

Source here, plus @Powerlord's comment below

share|improve this answer
Do we know this for sure? – Tom Brossman Dec 22 '12 at 18:35
@TomBrossman From the Ubuntu support page: "If your version of Ubuntu is not listed above, it is no longer supported and does not receive security or critical fixes." The versions listed as of 2012/12/22 are 8.04 LTS, 10.04 LTS, 11.10, 12.04 LTS, and 12.10. That's the latest 3 normal releases and latest 3 LTS releases (12.04 is both). – Powerlord Dec 22 '12 at 20:38
@Powerlord The most recent version to lose support was 11.04, on 28 October. That's well past the '2-3 weeks' from OP's question. Because of that contradiction, it isn't safe to assume that this is the root cause. Either Robin's estimate is off by nearly 2 months, or something else is wrong. – Tom Brossman Dec 22 '12 at 20:49

My version was 12.04 so still supported. Finally I had found the trouble:

In Synaptic → Settings → Repositories → Updates nothing was ticked. So I ticked "Important Security Updates" and "Recommended Updates". Then updates worked again normally. :)

But I really don't know why they were "un-ticked". This is quite strange.

share|improve this answer
It's good to know you got your problem solved. You can accept your own answer now and close the question. – carnendil Feb 20 '13 at 17:01

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