I am actually perplexed by this one, and I wonder if what I'm seeing is
a bug in systemd init.
On my Fedora Workstation install, gdm runs after network-online. The
gdm.service unit runs After systemd-user-sessions.service, which runs
After remote-fs.target. All of that is expected. But remote-fs.target is
definitely starting after network-online.target, which is not expected.
In the plot svg, remote-fs.target says that it runs After iscsi.service,
and network-online.target says that it runs before iscsi.service, but
the iscsi.service unit is disabled, so it doesn't show up anywhere in
the plot, except as a dependency of other units.
https://gordonmessmer.fedorapeople.org/systemd-plot/bootup-fedora-ws.svg
If I delete the unit entirely, then gdm.service runs before
network-online, which we want.
https://gordonmessmer.fedorapeople.org/systemd-plot/bootup-fedora-ws-no-iscsi.svg
So, the first mystery is that iscsi.service is creating an ordering
dependency even though it's disabled.
The second mystery is that I can only reproduce this problem on *some*
systems, and I cannot find anything they have in common. I don't know
why it affects some systems and not others.
I can reproduce the problem on my personal Workstation 42 install, but
not the Workstation 43 install on my employer-provided laptop.
I can reproduce the problem on a VM that boots the Workstation-43-Live
ISO, but then it won't happen on the same VM if I install Fedora on a
virtual disk and boot from that disk instead of the ISO.
The problem was brought to my attention by a user with Fedora 43 KDE.
How might I determine why systemd is starting remote-fs.target after
network-online.target on some systems, but not others, when all of them
have an iscsi.service unit which is disabled, and deleting that unit
appears to resolve the problem on the affected hosts?
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