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I've used with UbuntuOne on Ubuntu 10.04 (both 32- and 64-bit on different computers) and it worked very well until one month ago. Then I wanted to try to sync my contacts too, so I installed CouchDB from backport repository as described in the official guide for UbuntuOne; after that UbuntuOne doesn't sync or connect anymore.

So read a lot of forums and guides and I've reinstalled UbuntuOne client and now the client can't connect or login (even if I clear password from keymanager). I've used the ubuntuone-preferences, u1tools and u1sync... but nothing. When I enter just the u1tool command in the terminal (with any option), this appears:

Oops, an error ocurred: Traceback (most recent call last): Failure: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown return code 1

Any Ideas? Thanks.

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Can you try to this?

1) Remove any backport repository you may have added.

2) Run this at terminal:

sudo apt-get update && sudo apt-get install aptitude && sudo aptitude update && sudo aptitude purge ubuntuone-client && sudo aptitude install ubuntuone-client
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