Hi, To support linux guests with old kernel version, vitio driver backport is needed. But I cannot find kvm-guest-drivers-linux.git now. >From linux distributions' virtio backport versions, such as virtio-0.1-18.el3.src.rpm for RHEl3 hat and novell-virtio-drivers-2.6.27-sle10sp3.iso for SLES 10 sp3, virtio-serial driver is not included. Any advice is welcome. Thanks in advance. Regards, Hongyong -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html