amd64: does it ever work? ;)

[Michael Tokarev <mjt-XAri/EZa3C4vJsYlp49lxw@public.gmane.org>]

Hello!  A first-time poster (and user) is here... but not a newbie ;)

Some time ago I tried KVM for the first time, on an AMD X2-64 system
(BE-2400 processor, also tried with other similar processors, like
"plain" X2-64 4888+ etc), first with 2.6.23 vanilla kernel compiled
for 64 bits, SMP.  After it didn't work, I also tried KVM modules
from SVN (compiled against the same kernel sources), and when 2.6.24
was out, I tried that too.  Neither of which works.

Userspace tools is from Debian unstable -- 58+dfsg-1.

The effect is as follows.

With 2.6.23 and vanilla kvm modules, while from X, it opens the
"virtual console" (an X window), but that console is entirely
empty (black), and nothing more happens.  I can Ctrl+C the original
process, but nothing more.

With 2.6.23+modules-59, and with vanilla 2.6.24, it again opens
the window, and the HOST machine immediately reboots (goes into
BIOS Post screen).

When not loading kvm modules, it works in all 3 cases.

Where to look at to debug it further?

Thanks!

/mjt

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