I can confirm that the problem does not happen when cache is on SATA vs. NVME. I assume this needs to get pushed to the kernel then? Please advise.
cache nvme0n1p5 OFFLINE 0 0 0 sda3 ONLINE 0 0 0 Linux mp 4.8.0-54-generic #57~16.04.1-Ubuntu SMP Wed May 24 16:22:28 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16.04 Codename: xenial ** Changed in: zfs-linux (Ubuntu) Status: Invalid => New ** Summary changed: - zfs l2arc cache inhibits proper suspend + cache on NVMe inhibits proper suspend/hibernate - zfs l2arc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1670137 Title: cache on NVMe inhibits proper suspend/hibernate - zfs l2arc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1670137/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs