Wireless connection is up but doesn't work for a while on startup

[DBarzo]

Hi,

My system is:

- Acer TravelMate 5720
- Ubuntu 9.04
- Wicd 1.5.9
- WPA2 encryption

Using hardy I have no problems. When I upgraded to Jaunty, on startup, the connection seems to be established (wicd says CONNECTED) but if I ping my router I get "Destination Host Unreachable".

This for the first 1 minute...then the connection start to works!!
Also, sometimes during surfing, the connection stop to work again and the ping not work for a minute..

PS. I've added a restart network on startup (/etc/init.d/networking restart) but it not solve..

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.4 icmp_seq=3 Destination Host Unreachable
From 192.168.1.4 icmp_seq=5 Destination Host Unreachable
From 192.168.1.4 icmp_seq=6 Destination Host Unreachable
From 192.168.1.4 icmp_seq=8 Destination Host Unreachable
..... ..... ....
From 192.168.1.4 icmp_seq=49 Destination Host Unreachable
From 192.168.1.4 icmp_seq=50 Destination Host Unreachable
64 bytes from 192.168.1.1: icmp_seq=51 ttl=64 time=5.65 ms
64 bytes from 192.168.1.1: icmp_seq=52 ttl=64 time=1.11 ms
64 bytes from 192.168.1.1: icmp_seq=53 ttl=64 time=1.13 ms
64 bytes from 192.168.1.1: icmp_seq=54 ttl=64 time=1.07 ms
64 bytes from 192.168.1.1: icmp_seq=55 ttl=64 time=1.09 ms

[DBarzo (dbarzo)]

Ok, maybe this is not a bug "per se", or it is maybe related to a new/edited feature that creates some incompatibility within my system.

[DBarzo (dbarzo)]

More infos..

I've installed a new kernel:

# uname -a
Linux Barzo-laptop 2.6.29-02062902-generic #02062902 SMP Tue Apr 28 17:10:08 UTC 2009 i686 GNU/Linux

But the problem persist.
I've also noted that when I boot up the system, the connection is up but when I ping the router it start to answer always after 50-60 pings (seconds).
If I don't use the network (for example I don't start the browser and so on), its doesn't start to work.

Regards,
Daniele.