installation in xen freeze whole computer from NFS

Hi I have host server for xen (11.2 x86_64) and another server holding linux images. Those images are accesible via NFS.

When I am installing new machine on my xen host and using images on nfs share; whole host-machine freeze during installation (random time, random packages, but it freeze everytime). I had to hard rebooted. Machine do not respond to ping.
Performing same installaltion from local copy of same image (copy is done through NFS !) is always vithout any problem.

Xen host machine is MSI Wind and it have gb ethernet. I had some problem with it on Windows XP (disconecting) but on Windows Vista it was ok. On Linux I also did not encounter any problem so far.

Strange thing is that after hang there is no error in /var/log/messages. I would like to investigate what`s going on, what cause this freeze.

I am thing about sysrq messages, but this machine do not have any com port.

I would appreciate any hint how to get what is freezing, or whats going on.

Thanks.
Thindey

Here is output of lspci just for info

lspci
00:00.0 Host bridge: nVidia Corporation MCP79 Host Bridge (rev b1)
00:00.1 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.0 ISA bridge: nVidia Corporation MCP79 LPC Bridge (rev b2)
00:03.1 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.2 SMBus: nVidia Corporation MCP79 SMBus (rev b1)
00:03.3 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.5 Co-processor: nVidia Corporation MCP79 Co-processor (rev b1)
00:04.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1)
00:04.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1)
00:06.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1)
00:06.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1)
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)
00:09.0 PCI bridge: nVidia Corporation MCP79 PCI Bridge (rev b1)
00:0b.0 IDE interface: nVidia Corporation MCP79 SATA Controller (rev b1)
00:0c.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:10.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:15.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:16.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:17.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:18.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
03:00.0 VGA compatible controller: nVidia Corporation Device 0874 (rev b1)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
08:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device 8172 (rev 10)

This might be simply a permission problem. How does the NFS server handle root access to it’s exports. Mind, I’m no xen expert, neither NFS, I just remember having issues that this problem reminds me of.

I do not think this is tha case. Not only installation will start. But I can also copy whole image from this nfs share.
But thanks anyway