Hi. I buy a new gigabyte mainboard on 990fxa chipset, instead 970 chipset. Aand now system freeze on graphical login screen. Mainboard : gigabyte 990fxa-ud3 rev4 Xen: 4.1; 4.3* Grub CL:iommu=1 inclusive_mapping=1 xen-pciback.passthrough=1 elevator=noop iommu=pt amd_iommu= fullflush cpufreq=dom0-kernel console=xvc Kernels: 3.16.1; 3.12.1* Bios iommu feature: enable In standard ,non paravirtalized kernel(s) all boot fine and login in lightdm successfully. *also try _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users