/boot/efi too small for updates is related, but this might be helpful to others who encounter the same problem.
I installed R4.2.2 on a laptop some weeks ago and did the update to R4.2.3 when I got around to trying out.
The first observation I have is that it was not at all obvious that the update had failed for dom0 until I looked through the messages, which aren’t shown by default in “Qubes OS Update”. I discovered it when it seemed I needed to update again.
The failure was “installing package xen-hypervisor02001:4.17.5-3.fc37.x86_64 needs 9MB more space on the /boot/efi filesystem”.
My /boot/efi was 96M (as in the /boot/efi too small for updates thread. Instead of deleting windows, I took a chance and removed the existing Xen version to make room for the new one.
mv /boot/efi/EFI/qubes/xen-4.17.4.efi /boot
That worked, though there was a warning later in the sequence for the failure to remove it (because it was already gone).
However, despite the “transaction check” that there was sufficient space now passing, it ran out of space because
cp: error copying /boot/efi/EFI/qubes/xen-4.17.4.efi to /boot/efi/EFI/qubes/xen.efi: No space left on device
I deleted xen.efi and the reboot worked, so it seems that cp was superfluous (as well as not being accounted for by check for sufficient disk space).
Those workarounds might help someone. Now for KDE:
XFCE is not properly configurable for me in multiple respects, so I chose to install KDE. This occurred on installation
scriptlet failed: kde-settings-qubes-5.12.3-8.fc37.x86_64 /var/tmp/rpm-tmp.iJFzwH: line 4: patch: command not found
I ignored it, though perhaps it is associated with subsequent problems. One is that the NetworkManager applet is not visible in the tray at the bottom of the screen (unless I mouse over it, i.e., there is no visible icon). Another is with sticky keys. To begin with, these didn’t work, or worked in odd cases, e.g., after logging in with XFCE first. After the upgrade, sticky keys are active if disabled in the KDE Accessibility settings, and vice versa.
There are various other minor things not related to KDE, e.g., question marks in squares in Qubes OS Global Config that look like they should be tool tips or hyperlinks, but don’t do anything.
I have read a lot about Qubes and I commend Joanna and the Qubes team for developing a unique and valuable OS. However, at this point I am conflicted in deciding whether to spend more time on it. (For security, having two separate laptops for separate purposes might be good enough for me.) A constant stream of minor problems makes me wonder whether I should cut my losses before I commit to it and then encounter something that consumes hours investigating and trying (and perhaps failing) to fix. A point of concern with KDE is that, from what I’ve read, Gnome is favoured for the future.
Thank you anyway for your original and dedicated work.