On Mon, Feb 20, 2012 at 08:52:54AM -0800, Walter Goldens wrote:

quoted

Looks like this could be related with Power-Save. Seems APs
does not
handle PS well (between each ICMP packed our station is put
in
the sleep mode) . Vendor driver has  PS disabled, hence
problem
is not observable.

Try "iwconfig wlan0 power off" and see if it helps. 

Stanislaw

Hello again,

Unfortunately, disabling PS does not fix the problem:

I'm able to reproduce that problem locally, I'm adding debug
that problem to my TODO list ...

Stanislaw