Consistent packet loss with Vista

I was noticing odd disconnects running networked application on my laptop
since installing vista on it. After quite a bit of delving, what I'm seeing
is this.

I'm using ping as a way of checking for network connectiveity, it is a basic
but seemingly effective way of seeing how well I'm connected.

When I test my connection by pinging a known machine from vista I get a
pretty consistent 6-12% packet loss as reported by ping. It doesn't seem to
matter whether I use a wireless card or the builtin wired network card on the
laptop. Changing the cable doesn't change this result. Another machine on
the same cable gets 0% loss (it's running xp). Rebooting back to xp on the
original laptop gets 0% packet loss.

As far as I can tell, this is affecting two different network cards so I'm
hard pressed to think that it's a network card driver issue, but I've got no
clue how to pin this down. Right now my only solution is to switch back to
xp where this hardware suddenly works perfectly.

Any suggestions as to how I track this down?

BTW the machine is up to date as far as windowsupdate is concerned.

Thanks - Guy

I have the same problem as mentioned by Guy in the original post. I have
tested my router with Microsoft's router test and I pass everything fine
except the UPnP test, which I purposely have disabled in my router. So I am
fine there. My packet loss disappears for a little bit if I repair my
Internet connection. Disabling TCP autotuning doesnt seem to help. Lastly,
I am hardwired, so it is not a WiFi issue. I went into my XP partition to
see if I would get the same packet loss at regular intervals. The conclusion
was that I do NOT experience the same packet loss problem in my XP partition
with the same hardware. (A8N-E nforce4 ultra motherboard with built in nvidia
gigabit NIC).

I am not sure what else to do.

"Guy" wrote:

> I was noticing odd disconnects running networked application on my laptop
> since installing vista on it. After quite a bit of delving, what I'm seeing
> is this.
>
> I'm using ping as a way of checking for network connectiveity, it is a basic
> but seemingly effective way of seeing how well I'm connected.
>
> When I test my connection by pinging a known machine from vista I get a
> pretty consistent 6-12% packet loss as reported by ping. It doesn't seem to
> matter whether I use a wireless card or the builtin wired network card on the
> laptop. Changing the cable doesn't change this result. Another machine on
> the same cable gets 0% loss (it's running xp). Rebooting back to xp on the
> original laptop gets 0% packet loss.
>
> As far as I can tell, this is affecting two different network cards so I'm
> hard pressed to think that it's a network card driver issue, but I've got no
> clue how to pin this down. Right now my only solution is to switch back to
> xp where this hardware suddenly works perfectly.
>
> Any suggestions as to how I track this down?
>
> BTW the machine is up to date as far as windowsupdate is concerned.
>
> Thanks - Guy
>
>