Actually, I did found a leftover from an old iSCSI + GFS test (which I wasn't able to properly configure). In particular, there was some GFS process still running, even if I removed all related packages. My hypothesis is that, during the upgrade, the iscsi service wasn't able to restart because of this process, blocking the upgrade. The presence of the grep error put me in the wrong direction. After killing the process I solved the issue.
Thank you Lucas for your help and sorry for having raised a false alarm. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928000 Title: open-iscsi fails to upgrade (2.0.874-7.1ubuntu6.2) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/open-iscsi/+bug/1928000/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs