/var/log/dist-upgrade/apt-term.log does not contain all the (error) messages what was on the screen during do-release-upgrade.
I have found in /var/log/syslog a "Falling back to the standard locale ("C")": .... Nov 7 16:57:47 - org.debian.apt[893]: /usr/lib/python3/dist-packages/aptdaemon/worker/pkworker.py:35: PyGIWarning: PackageKitGlib was imported without specifying a version first. Use gi.require_version('PackageKitGlib', '1.0') before import to ensure that the right version gets loaded. Nov 7 16:57:47 - org.debian.apt[893]: from gi.repository import PackageKitGlib as pk Nov 7 16:57:47 - org.debian.apt[893]: 16:57:47 AptDaemon [INFO]: CommitPackages() was called: dbus.Array([dbus.String('python3-netifaces#auto')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('kmod'), dbus.String('libkmod2'), dbus.String('libxkbcommon-x11-0'), dbus.String('libxkbcommon0'), dbus.String('module-init-tools'), dbus.String('openssh-client'), dbus.String('ppp')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')) Nov 7 16:57:47 - AptDaemon.Trans: INFO: Queuing transaction /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c Nov 7 16:57:47 - org.debian.apt[893]: 16:57:47 AptDaemon.Trans [INFO]: Queuing transaction /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c Nov 7 16:57:47 - AptDaemon.Worker: INFO: Simulating trans: /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c Nov 7 16:57:47 - org.debian.apt[893]: 16:57:47 AptDaemon.Worker [INFO]: Simulating trans: /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c Nov 7 16:57:48 - AptDaemon.Worker: INFO: Committing packages: dbus.Array([dbus.String('python3-netifaces#auto')], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([dbus.String('kmod'), dbus.String('libkmod2'), dbus.String('libxkbcommon-x11-0'), dbus.String('libxkbcommon0'), dbus.String('module-init-tools'), dbus.String('openssh-client'), dbus.String('ppp')], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')) Nov 7 16:57:48 - org.debian.apt[893]: 16:57:48 AptDaemon.Worker [INFO]: Committing packages: dbus.Array([dbus.String('python3-netifaces#auto')], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([dbus.String('kmod'), dbus.String('libkmod2'), dbus.String('libxkbcommon-x11-0'), dbus.String('libxkbcommon0'), dbus.String('module-init-tools'), dbus.String('openssh-client'), dbus.String('ppp')], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')) Nov 7 16:57:48 - org.debian.apt[893]: perl: warning: Setting locale failed. Nov 7 16:57:48 - org.debian.apt[893]: perl: warning: Please check that your locale settings: Nov 7 16:57:48 - org.debian.apt[893]: #011LANGUAGE = (unset), Nov 7 16:57:48 - org.debian.apt[893]: #011LC_ALL = (unset), Nov 7 16:57:48 - org.debian.apt[893]: #011LANG = "C.UTF-8" Nov 7 16:57:48 - org.debian.apt[893]: are supported and installed on your system. Nov 7 16:57:48 - org.debian.apt[893]: perl: warning: Falling back to the standard locale ("C"). Nov 7 16:57:48 - org.debian.apt[893]: locale: Cannot set LC_CTYPE to default locale: No such file or directory Nov 7 16:57:48 - org.debian.apt[893]: locale: Cannot set LC_MESSAGES to default locale: No such file or directory Nov 7 16:57:48 - org.debian.apt[893]: locale: Cannot set LC_COLLATE to default locale: No such file or directory Nov 7 16:57:55 - AptDaemon.Worker: INFO: Processing transaction /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c Nov 7 16:57:55 - org.debian.apt[893]: 16:57:55 AptDaemon.Worker [INFO]: Processing transaction /org/debian/apt/transaction/fe6ec1c7a6bc44b7adfc9ccc71fdec0c .... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802194 Title: do-release-upgrade gives many "locale: Cannot set LC_ALL to default locale: No such file or directory" messages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1802194/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs