Update just got stuck, throwing errors can't seem to fix it

[yoel]

@scotty65 beat me to it .

If it is indeed related to the massive systemd 256 update, which I think it is, you will need to use a more recent kernel which you can do so by chrooting and install a newer kernel. I can see you are using kernel 5.4; it must be higher than that.

[Stable Update] 2024-07-01 - Kernels, Systemd, KDE Gear, LibreOffice, Firefox, Wine, Qemu

I can’t speak for kernel 5.4 but you should be using a newer kernel anyway. 6.1 and 6.6 are good LTS choices. It appears some users are having issues booting with older kernels, so you might want to install a newer kernel, reboot, then start the system update. If mount | grep cgroup outputs cgroup2, you shouldn’t have issues booting, unless you have a separate issue, of course.

If it still does not work, you will need to update your kernel boot parameters. You can do this by adding the following to the file /etc/default/grub in the GRUB_CMDLINE_LINUX_DEFAULT="" line:

SYSTEMD_CGROUP_ENABLE_LEGACY_FORCE=1 systemd.unified_cgroup_hierarchy=0

Then make sure to run:

update-grub