Gonzothegreat
Gonzothegreat replied to the topic 'new board: ODROID-C4' in the forum. 4 years ago

In the following folder /etc/apt/sources.list.d you should see a few mutlaqja-ubuntu-ppa files
See if one of them contain the following:

deb ppa.launchpad.net/mutlaqja/ppa/ubuntu focal main
then apt-get update / apt-get upgrade / apt-get dist-upgrade

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