*** This bug is a duplicate of bug 1898152 ***
https://bugs.launchpad.net/bugs/1898152
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1898152, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Please continue to report any other bugs you may
find.
** This bug has been marked a duplicate of bug 1898152
upgrade fails to calculate if gnuradio-dev is installed
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https://bugs.launchpad.net/bugs/1899707
Title:
Upgrade from 18.04.5LTS to 20.04LTS fails from terminal and upgrade
tool with error "Could not calculate the upgrade An unresolvable
problem occurred while calculating the upgrade. This was likely
caused by: * Unofficial software packages not provided by Ubuntu
Please use the tool 'ppa-purge' from the ppa-purge package to remove
software from a Launchpad PPA and try the upgrade again." No package
to be removed is mentioned
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