[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] VGA passtrough success report, GPLPV driver question

Hello Misi,

Congratulations on your successful passthrough.

I am still using the .357 drivers so I can't speak with regards to the newer version.


Starting with your device manager observation, if that device is something like "Xen pci device #0", then yes it is normal.  My understanding is that it's used by Xen and does not have an associated Windows driver.


As for the network problems, I haven't encountered anything quite like that, but I can throw out some suggestions.

First, is this only happening in FireFox, or also IE/Chrome?

Second, do you have anything besides a router/switch between your machine and the internet?  For example, a proxy or firewall?

Finally, can you share your Dom0's /etc/network/interfaces file, and your windows hvm configuration file?

In your HVM Configuration, you should be sure your mac address has the 00:16:3e prefix, so it should be something like this:


If you use a different mac address, you may encounter strange bugs.

The interfaces file should look like this if you have only one ethernet in use:

auto lo xenbr0
iface lo inet loopback
iface eth0 inet manual
iface xenbr0 inet dhcp
bridge_ports eth0

In my case I have an IPFire HVM so I am using two ethernet ports and have bridged the connections to place Dom0 and all VM's behind the firewall.  My revised configuration looks like this:

auto lo xenbr0 xenbr1
iface lo inet loopback
iface eth0 inet manual
iface xenbr0 inet manual
bridge_ports eth0
iface eth1 inet manual
iface xenbr2 inet dhcp
bridge_ports eth1

Since you can download files using URL's it isn't a DNS issue, but I have run into problems with Dom0 when changing from DHCP to a static configuration, where the /etc/resolv.conf file would retain old DNS Server information and fail to load addresses (but work with IP's).

The only other problem I have had with the GPLPV drivers specifically has been that my network device if disabled cannot be re-enabled, forcing me to reboot the Windows to get the network back online.

Obviously failing any of these changes you can always try removing the GPLPV Network Drivers specifically, I do not know if the performance gains are as significant as the VBD drivers, but I haven't tested it thoroughly.


Also, I am glad you liked my tutorial, your feedback is appreciated.

I will see about adding more information to the GPLPV driver installation segments, and more on the network configuration bugs I have run into.

I have plans to add HVM Router configuration instructions, new hardware I have been testing, and various improvements to certain installation/configuration steps.

Let me know if there is anything in particular you would like to see added or modified.


Casey DeLorme

On Tue, Oct 16, 2012 at 6:54 PM, Mihály Sisák <sisakmihaly@xxxxxxxxx> wrote:

I successfully passed my VGA to my domU.

mobo: GA-990FXA-UD5
vga: Gigabyte HD 6850
dom0: Debian testing
kernel: 3.4.12
xen: 4.2 release
domU: fully patched Windows 7

I didn't need to tweak anything, "it just werks" out of the box. I
followed this guide:
The tutorial is simply awesome, well written and understandable.

However, I can't get some of the GPLPV drivers working really well.
What I can't get to work
is the net and the vbd driver.

Windows sees the net driver as OK, but accessing webpages is
impossible. If you know
the exact address to a .exe file or something and you copy the link
into the address bar
it downloads it as anybody expect it to do, but if I click on the
"customize Firefox" link, it
hangs at the "connecting to mozilla.org" message.

The vbd driver is working fine, my experience index went up 1,2 points
after install, but one
of the three "xen block device" or something like that in device
manager has a yellow
exclamation mark next to it, which bothers me. Is it normal?

Can somebody give me any tips what to do? I've tried the
and the
versions, I've added "type=vif" to my config file. I used the "full
install" option.


Xen-users mailing list

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.