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I don't know when this appears and what is this:


strange icon


then when I click on that icon its showing this:


strange menu
When i clicking in Show Updates its bringing window Update Manager, and there is no new updates.
Can anyone say what is this?

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2 Answers 2

up vote 3 down vote accepted
+50

Go to Software Center, click on the Edit Menu, and then Software Sources. Makes sure you have the "Main Server" selected as your "Download from:" location.

Then open a terminal and run

sudo apt-get update

sudo apt-get upgrade

That should get rid of the error. If you still experience it you may have added PPAs that are no longer available. In that case select the "Other Software" tab in the Software Sources dialog, and uncheck all of them. You can then recheck them one by one and see if sudo apt-get update causes any errors.

enter image description here

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it has solved problem, but when i turned off my notebook and tuned on again i saw that icon again :( –  geoh May 24 '12 at 10:25
    
oh no, i have removed all ppas and now all is ok –  geoh May 24 '12 at 10:52
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Have you tried checking for updates manually from the command line and see if you're getting any errors?

I experienced this issue shortly after upgrading to 12.04, due to some PPA that hasn't been updated for precise. While all the other repositories were updated correctly, the update manager would still throw this error because of that single PPA that couldn't update.

I don't think I ever used the word update so many times in a paragraph

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