I have the same problem. In my case, it is caused by upgrading the NVIDIA driver metapackage to 510 from 470.
I am very grateful to @lockszmith for sharing his steps on https://askubuntu.com/questions/1388997/zsys-commit-service-fails-with- couldnt-promote-dataset-not-a-cloned-filesy It really makes me very wary of upgrading my systems. Those are LTS releases and things like this are very concerning. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1939210 Title: When using HWE, zfs-kmod and zfs user tools versions must match Status in zfs-linux package in Ubuntu: Confirmed Status in zsys package in Ubuntu: Confirmed Bug description: Ubuntu 20.04.2 LTS I ran into a problem recently (https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1939177) due to mismatched versions when HWE upgraded the kernel from 5.8 to 5.11 where the userspace tools don't match the zfs-kmod version. After the update the system ended up with zfs-0.8.3-1ubuntu12.12 and zfs- kmod-2.0.2-1ubuntu5 My understanding from asking in the OpenZFS github is that the two versions must match. This bug is to figure out what to do for those of us who use HWE and zfs. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1939210/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
