Fedora-Live-Workstation-x86_64-23-10.iso
USB based DVD
Lenovo Yoga

Description of problem:
Originally I tried to boot to rescue mode on a Lenovo Yoga that has Ubuntu 
installed. I wanted to start rescue mode, then wipe the ubuntu install by 
formatting the partitions (/ and boot using mkfs.ext4) and replace Ubuntu with 
Fedora 23.

So I inserted the Fedora 23 DVD, wait for the bios boot menu to appear, select 
the DVD drive with inserted Fedora 23 and boot to that. When the grub menu 
appears I select tab and change the kernel line to have "rescue" at the end, 
delete the "quiet" so I can see what is going on and add "vag=771".

Just after the "Started D-Bus System Message Bus" it stops:

"Cannot open access to console, the root account is locked. See sulogin(8) man 
page for more details.

As this is "rescue mode" and the idea of rescue mode is to be able to access 
anything that is on the computer even with a messed up password it is tricky.

How reproducible:
I have tried this on three computers:
 1: a beefy, selfmade workstation that has Fedora 22 installed on the local 
hard drive
 2: a Dell XPS 13, that has Windows installed (but UEFI disabled)
 3: Lenovo Yoga that has Ubuntu 16.04 installed (UEFI disabled)
all of them have the same issue

Additional info:
It does not matter what setting UEFI boot is set to, I tried this with every 
possible setting in the BIOS that was given to me by the different 
manufacturers, I could not get pass the "root account is locked"

Anybody any ideas, please.
thanks
Jobst
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