Comment # 33 on bug 1187264 from Sarah Kriesch

I have created a Pull Request for the kvm configuration topic with the console.
It seems, there are problems with ttyS0 on s390x:
https://github.com/openSUSE/obs-build/pull/699#issuecomment-863218898

The ttyS0 on s390x is not a serial line as known on other architectures

 s390vsl201 /> cat /proc/tty/drivers
 /dev/tty             /dev/tty        5       0 system:/dev/tty
 /dev/console         /dev/console    5       1 system:console
 /dev/ptmx            /dev/ptmx       5       2 system
 /dev/vc/0            /dev/vc/0       4       0 system:vtmaster
 sclp_vt220           /dev/ttysclp    4      65 system:/dev/tty
 tty3215              /dev/ttyS       4      64 system:/dev/tty
 tty3270              /dev/3270/tty 227 1-255 system:/dev/tty
 hvc                  /dev/hvc      229 0-7 system
 pty_slave            /dev/pts      136 0-1048575 pty:slave
 pty_master           /dev/ptm      128 0-1048575 pty:master
 unknown              /dev/tty        4 1-63 console

See /usr/src/linux/Documentation/s390/3270.rst ... that means if driver tty3215
is loaded or builtin (CONFIG_TN3215) you have them around.