I upgraded my system to Fedora 32 using Gnome Software, but when attempting to boot it failed:
Failed to switch root: Specified switch root path ‘/sysroot’ does not seem to be an OS tree. os-release file is missing
Whichever kernel I pick, it always enter emergency mode. Ideas?
Please can someone bring me up to speed? Updating/upgrading a System (release upgrade) from Gnome Software, … is that the new normal? I mean, is this recommended?
According to this, it is:
https://docs.fedoraproject.org/en-US/quick-docs/upgrading/
However, the only system I tried this on broke. The other three I upgraded with dnf system-upgrade are all good.
This mentions os-tree. Is this a Fedora silverblue installation?
(And yes, gnome-software does allow distribution upgrades)
It is Fedora Workstation 31, fresh install.
This have been seen in the past: 1492208 – Failed to switch root: Specified switch root path /sysroot does not seem to be an OS tree. os-release file is missing
(for Red Hat Enterprise Linux)… and there for Fedora long ago: Old askbot-based Ask Fedora archives are gone — look for new answers here instead! - Ask Fedora
But it is frankly a bit “over my head”… and would not really suggest you the commands suggested if you don’t understand them…might really be just a similar situation.
Thank you for the suggestions, but I had already bumped into these and they don’t work. /sysroot is not mounted to start with, and my fstab is missing (the only thing I have is a /etc/fstab.empty which is unsurprisingly empty ;-)). The os-release file is there and looks fine.
After investigating a bit more, the earliest problem that I can identify is this:
systemd-gpt-auto-generator: EFI loader partition unknown, exiting. (The boot loader did not set EFI variable LoaderDevicePartUUID)
Again, my google-fu is failing me and I have no idea how to proceed :-/
I am just now realizing that I am participating in an other post with very similar problem:
https://discussion.fedoraproject.org/t/fedora-32-switch-root-wont-start-after-upgrade/75877
From there… I would suggest to verify if you have root=[something] in your Grub entry.
But also keep an eye on:
https://bugzilla.redhat.com/show_bug.cgi?id=1765297
But it might turn out to be quite different issue because you seems to suggest that /sysroot is not empty at all, and that the file /sysroot/etc/os-release file is there… might check the permissions however.
This looks very promising… My sysroot is empty, the os-release file is in /etc/os-release, not under sysroot.
I am having a look now, I will report soon.
Well well, I am writing from the system that was broken 
In grub, I edited the entry and added root=/dev/mapper/fedora-root. That was enough to get it to boot for now.
/boot/efi/EFI/fedora/grub.cfg looks fine, it should set the default kernel options to the correct values… I’ll reboot now and check.
Indeed, now all the grub entries are fine, booting it once with the extra option was enough.
Thank you @pauld for your kind help! 
Glad to see you get it through!
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