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I just upgraded to ubuntu 11.10 from 11.04 and clock/calendar doesn't appear on the bar. So I figured out that indicator-datetime wasn't installed. When I tried to install it the following error appears:

xxx@yyy:/$ sudo apt-get install indicator-datetime
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 indicator-datetime : Depends: libecal1.2-10 (>= 3.2.1) but 3.2.0-0ubuntu1 is to be installed
                      Depends: libedataserver1.2-15 (>= 3.2.1) but 3.2.0-0ubuntu1 is to be installed
                      Depends: libedataserverui-3.0-1 (>= 3.2.1) but 3.2.0-0ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.

I don't know how to solve it.

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what is the complete output of sudo apt-get update && sudo apt-get upgrade ? (please add this to your question) – fossfreedom♦ Mar 12 '12 at 14:03
here is the report link – rayo hauno Mar 12 '12 at 14:58
you've got several PPAs - although the trace doesnt show the details - Try disabling them in Software Sources - rerun the "output" above again and then reinstall indicator-datetime. – fossfreedom♦ Mar 12 '12 at 15:00
ok, from our advice I figure out where is the problem. the problem was that Important security updates, Recommended updates and Pre-released updates where deactivated in Software sources. I activate them, and then run apt-get update and then apt-get install indicator-datetime and then restart and it works. – rayo hauno Mar 12 '12 at 16:08

2 Answers

up vote 1 down vote

This problem occurs when you have updated some packages but (at the time) certain dependencies had not yet been built and available in the repository.

To solve it, refresh your sources (sudo apt-get update) and then install the indicator-datetime package again.

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apt-get update seems work properly, see here the report link. after that, I run sudo apt-get install indicator-datetime again and obtain the same, see here the report link. In resume, it doesn't work. – rayo hauno Mar 12 '12 at 14:55
@rayohauno: wait a day or two and try it again, or after a few hours. – RolandiXor♦ Mar 12 '12 at 15:02
up vote 0 down vote

You have missing packages. Execute sudo apt-get install libecal1.2-10 libedataserver1.2-15 libedataserverui-3.0-1 and then run sudo apt-get install indicator-datetime again. It should install successfully this time.

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It doesn't solve the problem. After sudo apt-get install libecal1.2-10 libedataserver1.2-15 libedataserverui-3.0-1 it says that: Reading package lists... Done Building dependency tree Reading state information... Done libecal1.2-10 is already the newest version. libedataserver1.2-15 is already the newest version. libedataserverui-3.0-1 is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. After sudo apt-get install indicator-datetime the message is the same as in the first post. – rayo hauno Mar 12 '12 at 13:36

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