Yes, this ZFS is a manual setup. I tried to attach it to zfs-linux, but my browser failed me. @baling Thanks for moving the bug into the right direction. A run of apport-collect fails, because "Package zfs-linux not installed and no hook available, ignoring" As zfs-linux is the source package, but not the installable package, this seems correct. Instead I did run "apport-bug --save foo zfs-dkms": ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.6 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Wed Aug 19 22:44:53 2020 Dependencies: adduser 3.118ubuntu2 apt 2.0.2ubuntu0.1 apt-utils 2.0.2ubuntu0.1 binutils 2.34-6ubuntu1 binutils-common 2.34-6ubuntu1 binutils-x86-64-linux-gnu 2.34-6ubuntu1 build-essential 12.8ubuntu1 bzip2 1.0.8-2 ca-certificates 20190110ubuntu1.1 coreutils 8.30-3ubuntu2 cpp 4:9.3.0-1ubuntu2 cpp-9 9.3.0-10ubuntu2 debconf 1.5.73 debconf-i18n 1.5.73 dirmngr 2.2.19-3ubuntu2 distro-info-data 0.43ubuntu1.1 dkms 2.8.1-5ubuntu1 dpkg 1.19.7ubuntu3 dpkg-dev 1.19.7ubuntu3 fakeroot 1.24-1 file 1:5.38-4 g++ 4:9.3.0-1ubuntu2 g++-9 9.3.0-10ubuntu2 gcc 4:9.3.0-1ubuntu2 gcc-10-base 10-20200411-0ubuntu1 gcc-9 9.3.0-10ubuntu2 gcc-9-base 9.3.0-10ubuntu2 gnupg 2.2.19-3ubuntu2 gnupg-l10n 2.2.19-3ubuntu2 gnupg-utils 2.2.19-3ubuntu2 gpg 2.2.19-3ubuntu2 gpg-agent 2.2.19-3ubuntu2 gpg-wks-client 2.2.19-3ubuntu2 gpg-wks-server 2.2.19-3ubuntu2 gpgconf 2.2.19-3ubuntu2 gpgsm 2.2.19-3ubuntu2 gpgv 2.2.19-3ubuntu2 init-system-helpers 1.57 kmod 27-1ubuntu2 libacl1 2.2.53-6 libalgorithm-diff-perl 1.19.03-2 libalgorithm-diff-xs-perl 0.04-6 libalgorithm-merge-perl 0.08-3 libapt-pkg6.0 2.0.2ubuntu0.1 libasan5 9.3.0-10ubuntu2 libasn1-8-heimdal 7.7.0+dfsg-1ubuntu1 libassuan0 2.5.3-7ubuntu2 libatomic1 10-20200411-0ubuntu1 libattr1 1:2.4.48-5 libaudit-common 1:2.8.5-2ubuntu6 libaudit1 1:2.8.5-2ubuntu6 libbinutils 2.34-6ubuntu1 libblkid1 2.34-0.1ubuntu9 libbz2-1.0 1.0.8-2 libc-dev-bin 2.31-0ubuntu9 libc6 2.31-0ubuntu9 libc6-dev 2.31-0ubuntu9 libcap-ng0 0.7.9-2.1build1 libcc1-0 10-20200411-0ubuntu1 libcom-err2 1.45.5-2ubuntu1 libcrypt-dev 1:4.4.10-10ubuntu4 libcrypt1 1:4.4.10-10ubuntu4 libctf-nobfd0 2.34-6ubuntu1 libctf0 2.34-6ubuntu1 libdb5.3 5.3.28+dfsg1-0.6ubuntu2 libdpkg-perl 1.19.7ubuntu3 libexpat1 2.2.9-1build1 libfakeroot 1.24-1 libffi7 3.3-4 libfile-fcntllock-perl 0.22-3build4 libgcc-9-dev 9.3.0-10ubuntu2 libgcc-s1 10-20200411-0ubuntu1 libgcrypt20 1.8.5-5ubuntu1 libgdbm-compat4 1.18.1-5 libgdbm6 1.18.1-5 libgmp10 2:6.2.0+dfsg-4 libgnutls30 3.6.13-2ubuntu1.2 libgomp1 10-20200411-0ubuntu1 libgpg-error0 1.37-1 libgpm2 1.20.7-5 libgssapi3-heimdal 7.7.0+dfsg-1ubuntu1 libhcrypto4-heimdal 7.7.0+dfsg-1ubuntu1 libheimbase1-heimdal 7.7.0+dfsg-1ubuntu1 libheimntlm0-heimdal 7.7.0+dfsg-1ubuntu1 libhogweed5 3.5.1+really3.5.1-2 libhx509-5-heimdal 7.7.0+dfsg-1ubuntu1 libidn2-0 2.2.0-2 libisl22 0.22.1-1 libitm1 10-20200411-0ubuntu1 libkmod2 27-1ubuntu2 libkrb5-26-heimdal 7.7.0+dfsg-1ubuntu1 libksba8 1.3.5-2 libldap-2.4-2 2.4.49+dfsg-2ubuntu1.3 libldap-common 2.4.49+dfsg-2ubuntu1.3 liblocale-gettext-perl 1.07-4 liblsan0 10-20200411-0ubuntu1 liblz4-1 1.9.2-2 liblzma5 5.2.4-1 libmagic-mgc 1:5.38-4 libmagic1 1:5.38-4 libmpc3 1.1.0-1 libmpdec2 2.4.2-3 libmpfr6 4.0.2-1 libncursesw6 6.2-0ubuntu2 libnettle7 3.5.1+really3.5.1-2 libnpth0 1.6-1 libnvpair1linux 0.8.3-1ubuntu12.3 libp11-kit0 0.23.20-1build1 libpam-modules 1.3.1-5ubuntu4 libpam-modules-bin 1.3.1-5ubuntu4 libpam0g 1.3.1-5ubuntu4 libpcre2-8-0 10.34-7 libperl5.30 5.30.0-9build1 libpython3-stdlib 3.8.2-0ubuntu2 libpython3.8-minimal 3.8.2-1ubuntu1.2 libpython3.8-stdlib 3.8.2-1ubuntu1.2 libquadmath0 10-20200411-0ubuntu1 libreadline8 8.0-4 libroken18-heimdal 7.7.0+dfsg-1ubuntu1 libsasl2-2 2.1.27+dfsg-2 libsasl2-modules 2.1.27+dfsg-2 libsasl2-modules-db 2.1.27+dfsg-2 libseccomp2 2.4.3-1ubuntu3.20.04.3 libselinux1 3.0-1build2 libsemanage-common 3.0-1build2 libsemanage1 3.0-1build2 libsepol1 3.0-1 libsmartcols1 2.34-0.1ubuntu9 libsqlite3-0 3.31.1-4ubuntu0.2 libssl1.1 1.1.1f-1ubuntu2 libstdc++-9-dev 9.3.0-10ubuntu2 libstdc++6 10-20200411-0ubuntu1 libsystemd0 245.4-4ubuntu3.2 libtasn1-6 4.16.0-2 libtext-charwidth-perl 0.04-10 libtext-iconv-perl 1.7-7 libtext-wrapi18n-perl 0.06-9 libtinfo6 6.2-0ubuntu2 libtsan0 10-20200411-0ubuntu1 libubsan1 10-20200411-0ubuntu1 libudev1 245.4-4ubuntu3.2 libunistring2 0.9.10-2 libuuid1 2.34-0.1ubuntu9 libuutil1linux 0.8.3-1ubuntu12.3 libwind0-heimdal 7.7.0+dfsg-1ubuntu1 libzfs2linux 0.8.3-1ubuntu12.3 libzpool2linux 0.8.3-1ubuntu12.3 libzstd1 1.4.4+dfsg-3 linux-libc-dev 5.4.0-42.46 lsb-base 11.1.0ubuntu2 lsb-release 11.1.0ubuntu2 make 4.2.1-1.2 manpages 5.05-1 manpages-dev 5.05-1 mime-support 3.64ubuntu1 netbase 6.1 openssl 1.1.1f-1ubuntu2 passwd 1:4.8.1-1ubuntu5.20.04 patch 2.7.6-6 perl 5.30.0-9build1 perl-base 5.30.0-9build1 perl-modules-5.30 5.30.0-9build1 pinentry-curses 1.1.0-3build1 python3 3.8.2-0ubuntu2 python3-distutils 3.8.2-1ubuntu1 python3-lib2to3 3.8.2-1ubuntu1 python3-minimal 3.8.2-0ubuntu2 python3.8 3.8.2-1ubuntu1.2 python3.8-minimal 3.8.2-1ubuntu1.2 readline-common 8.0-4 sudo 1.8.31-1ubuntu1.1 tar 1.30+dfsg-7 ubuntu-keyring 2020.02.11.2 uuid-runtime 2.34-0.1ubuntu9 xz-utils 5.2.4-1 zfs-zed 0.8.3-1ubuntu12.3 zfsutils-linux 0.8.3-1ubuntu12.3 zlib1g 1:1.2.11.dfsg-2ubuntu1 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-26 (115 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair Package: zfs-dkms 0.8.3-1ubuntu12.3 PackageArchitecture: all ProcCpuinfoMinimal: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz stepping : 3 microcode : 0x28 cpu MHz : 3517.937 cache size : 8192 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 4 apicid : 7 initial apicid : 7 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts md_clear flush_l1d bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds bogomips : 7198.24 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: ProcEnviron: LC_TIME=de_DE.UTF-8 LC_MONETARY=de_DE.UTF-8 TERM=xterm-256color PATH=(custom, no username) LC_ADDRESS=de_DE.UTF-8 XDG_RUNTIME_DIR= LANG=en_US.UTF-8 LC_TELEPHONE=de_DE.UTF-8 SHELL=/bin/bash LC_NAME=de_DE.UTF-8 LC_MEASUREMENT=de_DE.UTF-8 LC_IDENTIFICATION=de_DE.UTF-8 LC_NUMERIC=de_DE.UTF-8 LC_PAPER=de_DE.UTF-8 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 SourcePackage: zfs-linux Tags: focal Uname: Linux 5.4.0-40-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) _MarkForUpload: True