libvirt users - Feb 2015 - Re: libvirt 1.2.10 and latest EL6 qemu-kvm

(I'm sorry, I didn't find my original message but I provide the
archive link:
https://www.redhat.com/archives/libvirt-users/2015-January/msg00069.html
)

I just tried the latest libvirt release (1.2.12), combined with the
following qemu EL6 package from centos:
qemu-kvm-0.12.1.2-2.448.el6_6.x86_64

Using 1.2.12 and this version of qemu-kvm, I still get the following
error when trying to start a domain:

error: Failed to start domain btcab0001ap.unix.banksys.be
error: internal error: unable to execute QEMU command 'qom-list': The
command qom-list has not been found

The older qemu package (qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64) works
just fine though (I also tried the qemu-rhev-packages for el6 from
ovirt, but no change).
I verified the changelog from libvirt 1.2.12 and the earlier suggested
fix is in there (but doesn't seem to change anything):

2015-01-14  Pavel Hrdina  <phrdina@redhat.com>
        qemu_monitor: introduce new function to get QOM path


Now, I have activated libvirtd debug and these are the qom-list lines
(I can provide the full logfile if wanted):

2015-02-11 14:10:33.259+0000: 13280: debug : virJSONValueToString:1528
:
result={"execute":"qom-list","arguments":{"path":"/machine/unattached/device[0]"},"id":"libvirt-5"}
2015-02-11 14:10:33.259+0000: 13280: debug :
qemuMonitorJSONCommandWithFd:290 : Send command
'{"execute":"qom-list","arguments":{"path":"/machine/unattached/device[0]"},"id":"libvirt-5"}'
for write with FD -1
2015-02-11 14:10:33.259+0000: 13280: info : qemuMonitorSend:972 :
QEMU_MONITOR_SEND_MSG: mon=0x7fa62801cbf0
msg={"execute":"qom-list","arguments":{"path":"/machine/unattached/device[0]"},"id":"libvirt-5"}
2015-02-11 14:10:33.260+0000: 13278: info : qemuMonitorIOWrite:503 :
QEMU_MONITOR_IO_WRITE: mon=0x7fa62801cbf0
buf={"execute":"qom-list","arguments":{"path":"/machine/unattached/device[0]"},"id":"libvirt-5"}
2015-02-11 14:10:33.261+0000: 13278: info : qemuMonitorIOProcess:399 :
QEMU_MONITOR_IO_PROCESS: mon=0x7fa62801cbf0 buf={"id":
"libvirt-5",
"error": {"class": "CommandNotFound",
"desc": "The command qom-list
has not been found", "data": {"name":
"qom-list"}}}
2015-02-11 14:10:33.261+0000: 13278: debug :
qemuMonitorJSONIOProcessLine:183 : Line [{"id": "libvirt-5",
"error":
{"class": "CommandNotFound", "desc": "The
command qom-list has not
been found", "data": {"name": "qom-list"}}}]
2015-02-11 14:10:33.261+0000: 13278: debug :
virJSONValueFromString:1361 : string={"id": "libvirt-5",
"error":
{"class": "CommandNotFound", "desc": "The
command qom-list has not
been found", "data": {"name": "qom-list"}}}
2015-02-11 14:10:33.261+0000: 13278: info :
qemuMonitorJSONIOProcessLine:203 : QEMU_MONITOR_RECV_REPLY:
mon=0x7fa62801cbf0 reply={"id": "libvirt-5",
"error": {"class":
"CommandNotFound", "desc": "The command qom-list has
not been found",
"data": {"name": "qom-list"}}}
2015-02-11 14:10:33.289+0000: 13280: debug : virJSONValueToString:1528
:
result={"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}
2015-02-11 14:10:33.289+0000: 13280: debug :
qemuMonitorJSONCommandWithFd:290 : Send command
'{"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}'
for write with FD -1
2015-02-11 14:10:33.289+0000: 13280: info : qemuMonitorSend:972 :
QEMU_MONITOR_SEND_MSG: mon=0x7fa62801cbf0
msg={"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}
2015-02-11 14:10:33.289+0000: 13278: info : qemuMonitorIOWrite:503 :
QEMU_MONITOR_IO_WRITE: mon=0x7fa62801cbf0
buf={"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}
2015-02-11 14:10:33.291+0000: 13278: info : qemuMonitorIOProcess:399 :
QEMU_MONITOR_IO_PROCESS: mon=0x7fa62801cbf0 buf={"id":
"libvirt-7",
"error": {"class": "CommandNotFound",
"desc": "The command qom-list
has not been found", "data": {"name":
"qom-list"}}}
2015-02-11 14:10:33.291+0000: 13278: debug :
qemuMonitorJSONIOProcessLine:183 : Line [{"id": "libvirt-7",
"error":
{"class": "CommandNotFound", "desc": "The
command qom-list has not
been found", "data": {"name": "qom-list"}}}]
2015-02-11 14:10:33.291+0000: 13278: debug :
virJSONValueFromString:1361 : string={"id": "libvirt-7",
"error":
{"class": "CommandNotFound", "desc": "The
command qom-list has not
been found", "data": {"name": "qom-list"}}}
2015-02-11 14:10:33.291+0000: 13278: info :
qemuMonitorJSONIOProcessLine:203 : QEMU_MONITOR_RECV_REPLY:
mon=0x7fa62801cbf0 reply={"id": "libvirt-7",
"error": {"class":
"CommandNotFound", "desc": "The command qom-list has
not been found",
"data": {"name": "qom-list"}}}
2015-02-11 14:10:33.291+0000: 13280: debug : virJSONValueToString:1528
:
result={"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}
2015-02-11 14:10:33.292+0000: 13280: debug : virJSONValueToString:1528
:
result={"id":"libvirt-7","error":{"class":"CommandNotFound","desc":"The
command qom-list has not been
found","data":{"name":"qom-list"}}}
2015-02-11 14:10:33.292+0000: 13280: debug :
qemuMonitorJSONCheckError:370 : unable to execute QEMU command
{"execute":"qom-list","arguments":{"path":"/machine/peripheral"},"id":"libvirt-7"}:
{"id":"libvirt-7","error":{"class":"CommandNotFound","desc":"The
command qom-list has not been
found","data":{"name":"qom-list"}}}
2015-02-11 14:10:33.292+0000: 13280: error :
qemuMonitorJSONCheckError:381 : internal error: unable to execute QEMU
command 'qom-list': The command qom-list has not been found

(again: full log can be provided, but maybe that should be sent in
private, I don't know if it is allowed as an attachment here).

Any tips?

Franky