After sid upgrade today.
1st reboot took ages to complete.
After what sddm showed no cursor.
But C-A-F1 was working so I did another reboot.
Then sddm took ages to show the cursor.
To be on the safe side I do another reboot, but then I do not login, but
instead leave the screen as is.
When I come back, several hours later, I find the screen disconnected (2nd
screen, display port, closed lid laptop).
Again I can have tty1 and reboot.
Then sddm take ages to show the cursor, but I can login eventually.
Not very convenient.