On startup: No supported Java packages were found. A supported Java package is one that installs a file of the form: /usr/lib/jvm/jre-$version-$vendor/bin/java For example, java-1.4.2-gcj-compat is a supported package because it installs: /usr/lib/jvm/jre-1.4.2-gcj/bin/java This happens even if java-1.7.0-openjdk is installed. Note that java-1.8.0-openjdk is properly recognized. I do understand the simplification of jvm packages but system-switch-java is especially useful with the possibility to have multiple 1.7 and the ability to test 1.8. Without system-switch-java it's too easy to come with weird combination if one tried to set up alternatives manually.
*** This bug has been marked as a duplicate of bug 990925 ***