If we can't probe the architecture from QMP we parse the architecture from the qemu binaries name. This results in the architecture being i386 instead of i686 which then results in QEMU_CAPS_PCI_MULTIBUS being unset which gives a broken qemu command line. This probably didn't show up earlier since most of the time there's also a /usr/bin/qemu around which results in i686 capabilities. --- src/qemu/qemu_capabilities.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 7c391b3..e897f86 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2055,6 +2055,8 @@ qemuCapsInitHelp(qemuCapsPtr caps) /* For historical compat we use 'itanium' as arch name */ if (STREQ(tmp, "ia64")) tmp = "itanium"; + else if (STREQ(tmp, "i386")) + tmp = "i686"; } else { uname_normalize(&ut); tmp = ut.machine; -- 1.7.10.4