*** This bug is a duplicate of bug 1279762 ***
https://bugs.launchpad.net/bugs/1279762
Thanks for your reply. i successfully Upgraded to new Ubuntu . Its
cinnamon issue as you said. so i uninstall it and try to upgrade it then
it successfully upgraded
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https://bugs.launchpad.net/bugs/1318197
Title:
Could not calculate the upgrade An unresolvable problem occurred
while calculating the upgrade. This can be caused by: * Upgrading
to a pre-release version of Ubuntu * Running the current pre-release
version of Ubuntu * Unofficial software packages not provided by
Ubuntu If none of this applies, then please report this bug using
the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
To manage notifications about this bug go to:
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