After updating and rebooting my KDE Manjaro 'Testing' system, I am greeted by the following message:
KWin is unstable.
It seems to have crashed several times in a row.
You can select another window manager to run:
is my only option.
Pressing either OK or Cancel results in no action / system freeze.
Rebooting and using the LTS 4.19.xx kernel leads to the same result.
How can I boot into my system?
Edit: system details
AMD Ryzen 5 2500U, configured as described here: