Just did a "sudo apt-get install plymouth-theme-ubuntu-logo", and the boot splash-screen appeared again :-)
So it seems that this package was removed (whyever) when I did the first update after installation, because the boot-splash-screen was there when I bootet the system for the first time.
Just did a "sudo apt-get install plymouth- theme-ubuntu- logo", and the boot splash-screen appeared again :-)
So it seems that this package was removed (whyever) when I did the first update after installation, because the boot-splash-screen was there when I bootet the system for the first time.
So I think the bug can be regarded as fixed?