Fedora 43, ZFS 2.4.2 dracut build fails

System information

Type	Version/Name
Distribution Name	Fedora
Distribution Version	43
Kernel Version	6.19.10-200.fc43.x86_64 -- build failing for 7.0.4-100.fc43.x86_64
Architecture	x86_64
OpenZFS Version	2.4.2

Describe the problem you're observing

I am unable to dnf upgrade due to a dracut build failure:

[32/32] Removing libuutil3-0:2.4.1-1.fc43.x86_64                                                                                                                                                                                                                                      100% |   0.0   B/s |   5.0   B |  00m31s
>>> Running %posttrans scriptlet: kernel-core-0:7.0.4-100.fc43.x86_64                                                                                                                                                                                                                                                         
>>> Finished %posttrans scriptlet: kernel-core-0:7.0.4-100.fc43.x86_64                                                                                                                                                                                                                                                        
>>> Scriptlet output:                                                                                                                                                                                                                                                                                                         
>>> grub2-probe: error: ../grub-core/kern/fs.c:123:unknown filesystem.                                                                                                                                                                                                                                                        
>>>                                                                                                                                                                                                                                                                                                                           
>>> Error! Could not locate dkms.conf file.                                                                                                                                                                                                                                                                                   
>>> File: /var/lib/dkms/evdi/1.14.6/source/dkms.conf does not exist.                                                                                                                                                                                                                                                          
>>> dracut-install: Failed to find module 'zfs'                                                                                                                                                                                                                                                                               
>>> dracut[E]: FAILED:  /usr/lib/dracut/dracut-install -D /var/tmp/dracut.dinQq73/initramfs --kerneldir /usr/lib/modules/7.0.4-100.fc43.x86_64 -m zfs                                                                                                                                                                         >>>                                                                                                                                                                                                                                                                                                                           
Complete!

Journalctl:

May 13 06:49:51 myhostname dracut[1304620]: *** Including module: kernel-modules-extra ***
May 13 06:49:51 myhostname dracut[1304620]:   kernel-modules-extra: configuration source "/run/depmod.d" does not exist
May 13 06:49:51 myhostname dracut[1304620]:   kernel-modules-extra: configuration source "/etc/depmod.d" is ignored (directory or doesn't exist)
May 13 06:49:51 myhostname dracut[1304620]:   kernel-modules-extra: configuration source "/lib/depmod.d" does not exist
May 13 06:49:51 myhostname dracut[1304620]: *** Including module: zfs ***
May 13 06:49:51 myhostname dracut[1304620]: FAILED:  /usr/lib/dracut/dracut-install -D /var/tmp/dracut.ddhnn4f/initramfs --kerneldir /usr/lib/modules/7.0.4-100.fc43.x86_64 -m zfs

Packages:

$ rpm -qa | grep -E '\-2\.4\.1-|-2\.4\.2-'
Box2D-2.4.2-5.fc43.x86_64
libnvpair3-2.4.2-1.fc43.x86_64
libuutil3-2.4.2-1.fc43.x86_64
zfs-dkms-2.4.2-1.fc43.noarch
libzfs7-2.4.2-1.fc43.x86_64
libzpool7-2.4.2-1.fc43.x86_64
zfs-2.4.2-1.fc43.x86_64
zfs-dracut-2.4.2-1.fc43.noarch

$ sudo rpm -qa | grep kernel-core
kernel-core-6.19.10-200.fc43.x86_64
kernel-core-6.19.14-200.fc43.x86_64  ## I had the same issue on this kernel with 2.4.1, which is why I held back on 6.19.10-200
kernel-core-7.0.4-100.fc43.x86_64

DKMS install:

$ sudo dkms install -m zfs -v 2.4.2
Module zfs/2.4.2 already installed on kernel 6.19.10-200.fc43.x86_64 (x86_64), skip. You may override by specifying --force.
Executing post-transaction command....................(bad exit status: 1)
Failed command:
dracut --regenerate-all --force

I have pinned the working Kernel in ZFSBoot menu in case I need to reboot, but would appreciate the help:

$ zfs get all zroot/ROOT/fedora | grep zfs
zroot/ROOT/fedora  org.zfsbootmenu:commandline  nvme_core.default_ps_max_latency_us=0 pcie_aspm=off pcie_port_pm=off rhgb amdgpu.cik_support=1 radeon.cik_support=0  local
zroot/ROOT/fedora  org.zfsbootmenu:kernel       vmlinuz-6.19.10-200.fc43.x86_64$                                                                                     local
zroot/ROOT/fedora  org.zfsbootmenu:keysource    zroot/ROOT/fedora                                                                                                    inherited from zroot

Describe how to reproduce the problem

Unsure

Include any warning/errors/backtraces from the system logs

See above

Are you using zfs for the root filesystem?

Indeed, via ZFSBootMenu

Ah, that is why you are using zfs-dracut. I only use zfs for data storage.

Fingers crossed that a backport of #18526 fixes this problem.

@Kaurin

@Kaurin I would be surprised if #18526 fixed this.

Some basic things:

Is zfs.ko somewhere in /usr/lib/modules/7.0.4-100.fc43.x86_64?

Can you dig down as to why this is specifically failing? Maybe run dracut-install with --verbose or strace it?

FAILED:  /usr/lib/dracut/dracut-install -D /var/tmp/dracut.ddhnn4f/initramfs --kerneldir /usr/lib/modules/7.0.4-100.fc43.x86_64 -m zfs

Hi,

Is zfs.ko somewhere in /usr/lib/modules/7.0.4-100.fc43.x86_64?

find /usr/lib/modules/7.0.4-100.fc43.x86_64 -iname '*zfs*'
<no output>

Can you dig down as to why this is specifically failing? Maybe run dracut-install with --verbose or strace it?
I don't run dracut-install manually. It is ran by dnf at some point. The temporary location is not available after the installer finishes:

>>> Error! Could not locate dkms.conf file.                                                                                                 
>>> File: /var/lib/dkms/evdi/1.14.6/source/dkms.conf does not exist.                                                                        
>>> dracut-install: Failed to find module 'zfs'                                                                                             
>>> dracut[E]: FAILED:  /usr/lib/dracut/dracut-install -D /var/tmp/dracut.d93UTEi/initramfs --kerneldir /usr/lib/modules/7.0.6-100.fc43.x86_
>>>                                                                                                                                         
Complete!
root@myhostname:~# ls /var/tmp/dracut.d93UTEi/initramfs
ls: cannot access '/var/tmp/dracut.d93UTEi/initramfs': No such file or directory

I will be switching to Ubuntu because of its native ZFS support and abandoning Fedora with ZFS root.

This workstation needs a serious rework anyway.

Closing this one out. Sorry for having raised this.

I was not able to switch yet, but the fix was as follows:

# 7.0.13 kernel being the latest at the time of typing this
sudo dkms install -m zfs -v 2.4.3 -k 7.0.13-100.fc43.x86_64
sudo dracut --regenerate-all --force -v
sudo dkms status
zfs/2.4.3, 6.19.10-200.fc43.x86_64, x86_64: installed
zfs/2.4.3, 7.0.13-100.fc43.x86_64, x86_64: installed

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Fedora 43, ZFS 2.4.2 dracut build fails #18527

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Fedora 43, ZFS 2.4.2 dracut build fails #18527

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System information

Describe the problem you're observing

Describe how to reproduce the problem

Include any warning/errors/backtraces from the system logs

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edgan commented on May 13, 2026

Kaurin commented on May 13, 2026

edgan commented on May 13, 2026

Kaurin commented on May 14, 2026

tonyhutter commented on May 14, 2026

Kaurin commented on May 14, 2026

Kaurin commented on Jun 30, 2026

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