Comment # 24 on bug 904987 from Steffen Golle

I ran into the same problem. openSUSE Tumbleweed with Kernel 4.9.10 is not
starting anymore. At boot, the plymouth splash screen doesn't show the password
prompt. The system message from dracut-initqueue is: Failed to connect to the
bus. No such file or directory.

Can you tell me, how to enter the dracut shell from grub?