KVM-58 -- existing VM just hangs with black screen

Richard W.M. Jones
2008-01-02T12:08:12Z

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I've just got an upgrade to KVM-58 as part of the latest Fedora.

Unfortunately my existing VM (a Windows 2008 Server instance) no longer
boots. In fact it hardly gets anywhere at all. Immediately after
running qemu-kvm, I just get a black screen (no BIOS/boot messages at
all) and using 100% of CPU.

No kernel messages. 'strace' indicates that qemu-kvm is doing a lot of
stuff (issuing lots of ioctl, gettimeofday, etc.).

I can get to the qemu monitor. Are there any useful commands to issue?

'info blockstats' shows a single 512 byte read from ide-hd0, presumably
it has read the boot sector but for some reason cannot boot from it.

Any ideas on what I can do to debug this further?