*** This bug is a duplicate of bug 1069133 ***
https://bugs.launchpad.net/bugs/1069133
Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides Xorg packages. This will prevent the upgrade as that
PPA contains different versions of packages essential to
The upgrader does not support unknow version from third party (ppa
packages are logged as broken).
Use 'ppa-purge' for each ppa, to downgrade to genuine ubuntu version, then
check none of these ppas are active.
Next step is to clean the system via 'gtkorphan' & 'bleachbit' (as root,
carefully
** Tags added: artful2bionic
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