it was oracle-java8* from ppa:webupd8team/java ... even ppa-purge had
trouble handling them. do-release-upgrade should handle these situations
or at least tell what packages are causing the problem.
$ sudo ppa-purge -p java webupd8team
Updating packages lists
PPA to be removed: webupd8team java
Package revert list generated:
oracle-java8-installer/trusty oracle-java8-set-default/trusty
Disabling webupd8team PPA from
/etc/apt/sources.list.d/webupd8team-java-trusty.list
Updating packages lists
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Release 'trusty' for 'oracle-java8-installer' was not found
E: Release 'trusty' for 'oracle-java8-set-default' was not found
Unable to find an archive "trusty" for the package "oracle-java8-installer"
Unable to find an archive "trusty" for the package "oracle-java8-set-default"
Unable to find an archive "trusty" for the package "oracle-java8-installer"
Unable to find an archive "trusty" for the package "oracle-java8-set-default"
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.
PPA purged successfully using aptitude fallback
$ sudo ppa-purge -p java webupd8team
Updating packages lists
PPA to be removed: webupd8team java
Warning: Could not find package list for PPA: webupd8team java
$ dpkg -l | grep oracle
ii oracle-java8-installer 8u66+8u65arm-1~webupd8~1
all Oracle Java(TM) Development Kit (JDK) 8
ii oracle-java8-set-default 8u66+8u65arm-1~webupd8~1
all Set Oracle JDK 8 as default Java
$ sudo apt-get remove --purge oracle-java8-installer oracle-java8-set-default
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
oracle-java8-installer* oracle-java8-set-default*
0 upgraded, 0 newly installed, 2 to remove and 1 not upgraded.
After this operation, 167 kB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 239897 files and directories currently installed.)
Removing oracle-java8-set-default (8u66+8u65arm-1~webupd8~1) ...
Purging configuration files for oracle-java8-set-default
(8u66+8u65arm-1~webupd8~1) ...
Removing oracle-java8-installer (8u66+8u65arm-1~webupd8~1) ...
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https://bugs.launchpad.net/bugs/1512819
Title:
do-release-upgrade refused to upgrade 14.04 to vivid
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1512819/+subscriptions
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