Hi Douglas,
as you installed starting from a june snapshot you should still have the previous kernel installed (5.10.56) and available in the Grub advanced options submenu. Did you try that? According to other reports problems seems to happen since 5.10.57 update and this would explain why your system worked before updating.

The kernel is built from the kernel source rpm that you can find in the sources folder.

Hi Douglas,
I've packaged a new kernel update which is under testing, if you want to test it against the problems you are having in your installation you may install it with the following command:

sudo dnf update kernel-mamba-x86_64 kernel-mamba-x86_64-headers --enablerepo=unstable-makedist

Silvan,

Just to inform you of other things I have done...
My boot stick works just fine and I can complete an install. Upon reboot, I can log in, but just get the spinning wheel.
So I switched to tty2 and ran systemctl stop sddm and then systemctl disable SDDM.
I then, (without rebooting), installed lxdm and ran systemctl start lxdm. The lxdm login came right up and I could log in normally, without rebooting.
I then ran a selective update, I deselected sddm and sddm-kcm and the newer 5-10.47 kernel. Update completed, but upon reboot, (with quiet turned off), the boot process would just stop and never go to login.

So...I'll try your suggestion above for the new kernel and let you know how it goes.

Douglas

Hi Douglas,
thanks for reporting your attemps with openmamba.

Here are the news from my side: after deep research I identified the cause of Plasma Desktop not starting in the file /etc/xdg/kwinrc which would cause the window manager process kwin_x11 to run at 100% CPU and block the desktop startup. This only happens the first time a user logs in, because thereafter the file kwinrc is read from the local home directory. So the fix for this is in the desktop-base-kde update to version 5.0.

Other problems you may have after updating depend on the fact that you are starting from a three-months old live image and here the glibc update to the /usr flat filesystem is probably the cause of further problems, so I would suggest you to try the openmamba-diskimg-livecd (with EFI boot support) or openmamba-livecd that have been made available between yesterday and today with the more recent kernel and everything fixed from my point of view.

Silvan,

I'm keeping my finger crossed, but I think I may finally have a working system, thanks to your hard work.
So...I created a new boot stick with the openmamba-diskimage-livecd-en-snapshot-20210912 image and completed the install and update.
It looks like it is running good; I will try things out and let you know.
Thanks again.

Douglas