If a domain is initially created without a <vidoe> device but with other devices (like <interface>), PCI device slots normally reserved for hardcoded devices (host bridge, IDE controller, video) get assigned to these. If than later on a <video> device is added without removing the already assigned <addresse>s, the re-definition fails in qemuAssignDevicePCISlots() with the error message "Primary video card must have PCI address 0:0:2.0" To simplify editing existing domains just reserve the first three slots for internal usage by setting qemuDomainPCIAddressSet.nextslot = 3. Signed-off-by: Philipp Hahn <hahn(a)univention.de&gt; --- src/qemu/qemu_command.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index c63de09..c359fd0 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -733,6 +733,9 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def) if (!(addrs = qemuDomainPCIAddressSetCreate(def))) goto cleanup; + /* reserve first 3 slots for hardcoded devices */ + addrs->nextslot = 3; + if (qemuAssignDevicePCISlots(def, addrs) < 0) goto cleanup; } -- 1.7.1