Comment # 13 on bug 1202950 from Lukas Ocilka

Logs show that the Installer has been started, and it has been started in text
mode as requested.

Nothing really suspicious for the first sight, except "FAT-fs (sdf1): Volume
was not properly unmounted. Some data may be corrupt. Please run fsck." in
'messages' which IMO should not be causing this behavior.

There's one more thing you could do if you had more computers: try
installing/updating the system using ssh:
https://en.opensuse.org/SDB:Linuxrc#p_ssh (search for "ssh" option)

 # use ssh and set ssh password
 ssh=1 sshpassword=foobar123

when the installation system boots, it tells you the IP to connect to remotely
and you just run `yast` to start it. In that case, the display is not used for
YaST and it might work. You may also try to look around using another ssh
connection.