You have many unsupported PPA's in your sources list. They are whats holding
the upgrade. You will need to clean them out and then try again. To clean,
consider the tool 'ppa-purge'.
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** Changed in: update-manager (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/840985
Title:
Upgrading to Oneiric Oncelot. Warning message appears saying: Cannot
install Ubuntu Desktop. The warning asks to file the bug. Is it safe
for me to go ahead with upgrade?
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