This bug was introduced by upgrade the packages
* busybox-initramfs
* busybox-static
from issue "1.22.0-5ubuntu1" to "1.22-0-6ubuntu1"
Downgrade to the mentioned former version (anymore available in the archives, but stored localy) or to "1.21.0-1ubuntu1" followed by
* "sudo update-initramfs -u"
eliminates the bug described.
This bug was introduced by upgrade the packages
* busybox-initramfs
* busybox-static
from issue "1.22.0-5ubuntu1" to "1.22-0-6ubuntu1"
Downgrade to the mentioned former version (anymore available in the archives, but stored localy) or to "1.21.0-1ubuntu1" followed by
* "sudo update-initramfs -u"
eliminates the bug described.