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[Xen-users] need help with XenVGAPassthrough



Hello All.
I need help to understand XenVGAPassthrough. I add xen-pciback.hide=(00:02.0@4) to kernel line in grub and then when PC come to loading of X I see blank screen. I have remote access, so I can start VM. And then I see same thing thing (can see start of booting process and problem at the end)
when I run VM with "gfx_passthru = 1" it is blank screen, without it I get some static pixels garbage in vnc window.
I need video acceleration in VM.

I run ubuntu 12.04 with xen 4.1.3 from repository, and currently I trying xen 4.2 from sources.

I've changed some Xen`s flags in ubuntu generic kernel form be module to be build-in:
CONFIG_XEN=y
CONFIG_XEN_DOM0=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_PVHVM=y
CONFIG_XEN_MAX_DOMAIN_MEMORY=128
CONFIG_XEN_SAVE_RESTORE=y
# CONFIG_XEN_DEBUG_FS is not set
CONFIG_PCI_XEN=y
CONFIG_XEN_PCIDEV_FRONTEND=m
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_BACKEND=m
CONFIG_NETXEN_NIC=m
CONFIG_XEN_NETDEV_FRONTEND=y
CONFIG_XEN_NETDEV_BACKEND=m
CONFIG_INPUT_XEN_KBDDEV_FRONTEND=m
CONFIG_HVC_XEN=y
CONFIG_XEN_WDT=m
CONFIG_XEN_FBDEV_FRONTEND=m
CONFIG_XEN_BALLOON=y
CONFIG_XEN_SELFBALLOONING=y
CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XEN_BACKEND=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_XENBUS_FRONTEND=y
CONFIG_XEN_GNTDEV=y
CONFIG_XEN_GRANT_DEV_ALLOC=m
CONFIG_SWIOTLB_XEN=y
CONFIG_XEN_TMEM=y
CONFIG_XEN_PCIDEV_BACKEND=y
CONFIG_XEN_ACPI_PROCESSOR=y

Hardware:
Processor: Intel Core i7-2600 @ 3.39GHz (8 Cores), Motherboard: Dell 0HY9JP, Chipset: Intel 2nd Generation Core Family DRAM, Memory: 15360MB, Disk: 1000GB Seagate ST1000DM003-9YN1, Graphics: Intel 2nd Generation Core Family IGP, Audio: Realtek ALC269VB, Network: Intel 82579LM Gigabit Connection

Software:
OS: Ubuntu 12.04, Kernel: 3.2.28xen (x86_64), Display Driver: intel 2.17.0, Compiler: GCC 4.6, File-System: ext4

alexander@alexander-OptiPlex-790:~$ lspci -k
...
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
    Subsystem: Dell Device 04ad
    Kernel driver in use: pciback
    Kernel modules: i915
...

VM: ubuntu 12.04 (without any changes)

Thanks ahead.
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