Comment 3 for bug 1795857

I've send a patch for the kernel part of this request:
https://lists.ubuntu.com/archives/kernel-team/2019-March/099704.html

Additionally to it the kmod's "blacklist bochs-drm" entry from it's /etc/modprobe.d/blacklist-framebuffer.conf file it ships would need to get removed.

With this I can successfully start VMs wit stdvga as display under QEMU and/or QEMU/KVM again.
Without this it's completely broken, but note that the installation itself works, you'll only see the issues after you boot in the fresh installed system.