A few days ago Ubuntu's Software updater awaits user input (q to Quit). I have attached a screenshot with the problem. I think this is related with fake sync from Debian.
What does this mean and how to fix this ?
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You have, presumably inadvertently, installed the apt-listchanges package. This packages lets you review the list of changes whenever you upgrade packages. The software that's running in the terminal and that waits for you to press
q is the pager less, by the way.
apt-listchanges package and this will go away.
This is completely unrelated to “fake sync from Debian”, that just happens to be how the maintainer of
p7zip described the latest update to the package.