The issue of an OpenBSD guest hanging at “Starting tty flags” on a Linux KVM host is often caused by a compatibility issue between the OpenBSD kernel and the virtualization technology used by KVM.
Here are a few steps you can try to resolve the issue:
- Upgrade to the latest version of KVM and OpenBSD. This will ensure that you are running the most recent and stable versions of both components.
- Check the KVM settings to make sure that the OpenBSD guest is configured to use the correct virtualization technology. Some KVM installations may be set to use an older virtualization technology that is not compatible with OpenBSD.
- Try booting the OpenBSD guest with a different kernel. OpenBSD provides multiple kernels, and switching to a different kernel may resolve the issue. (http://www.tntechoracle.com/)
- Try booting the OpenBSD guest in a different virtualization environment. Some virtualization environments, such as VirtualBox or VMware, may be more compatible with OpenBSD than KVM.
If none of these steps resolve the issue, it may be necessary to consult the OpenBSD mailing lists or forums for further assistance. The OpenBSD community is very active and knowledgeable, and someone may have encountered and resolved a similar issue in the past.