We discussed these issues on freenode #ubuntu-libertine, recapping here.
You can find logs for libertine applications in the
$HOME/.cache/upstart directory. For information about individual apps, the file pattern to look for is
application-legacy-$CONTAINERID_$APPNAME_0.0-.log. For instance, if you launch gedit from the puritine container (default on UT), the log will be available in
There might also be some interesting information in
$HOME/.cache/upstart/unity8.log for general Unity 8 messages, or
$HOME/.cache/upstart/scope-registry.log for messages pertaining to running the scope.
Note that vivid is no longer supported by app developers, so not all applications are guaranteed to work. There's also the possibility that app developers will release non-working armhf builds of their apps due to the small user pool.