Comment 11 for bug 852458

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Rolf Leggewie (r0lf) wrote :

@Anybody who can reproduce this

Please change the contents of your file /etc/apt/apt.conf.d/80-btrfs-snapshot to

DPkg::Pre-Invoke {"if [ -x /usr/bin/apt-btrfs-snapshot ] && apt-btrfs-snapshot supported; then flock -w 90 -x /run/apt-btrfs-snapshot.lock apt-btrfs-snapshot snapshot; fi "; };

on a single line and see if that fixes the problem. Apparently, 1 sure way to trigger this is to use update-manager, I believe. You will need to have the util-linux package installed.