Joseph, thanks for your answer. I just tried latest upstream kernel: $ uname -sr Linux 4.19.0-041900rc6-generic
And I tried to reproduce the problem and it still happens, unfortunately. ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1794763 Title: High utilisation of memory freezes Ubuntu completely for a long time, with an extremely high access to the hard disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794763/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs