11.10 | wireless connection problem - internet speed <1Mbps instead of 4Mbps

Hi guys,

I have a problem with my wifi connection. I moved to ubuntu 11.10 from win7 and there's a huge internet speed drop (to <1Mbps from 4Mbps).

I have a ASUS F3F-AP013 laptop with Intel WM3495ABG wireless module. Internet is slower since the beginning, I've checked web for a solution and found lots of threads about disabling ipv6. I've tried many of them, some of them helped for about couple of minutes, but after that it was the same story all over again.

No matter if I use chrome, software center, download or torrent, it's still the same.

Just for the record, I'm new to linux distributions, but I'm highly experienced windows user, so I'm not a complete idiot. Although, please be patient with me and write the replies as clearly as possible. Thanks very much.

Let's begin with some logs.

==
sudo lshw -c network
==
*-network
       description: Wireless interface
       product: PRO/Wireless 3945ABG [Golan] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: 02
       serial: 00:13:02:df:d5:8e
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwl3945 driverversion=3.0.0-15-generic firmware=15.32.2.9 ip=192.168.1.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
       resources: irq:43 memory:fdfff000-fdffffff
  *-network
       description: Ethernet interface
       product: RTL-8139/8139C/8139C+
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: eth0
       version: 10
       serial: 00:18:f3:cf:87:17
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=64 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10Mbit/s
       resources: irq:18 ioport:d800(size=256) memory:fe8ffc00-fe8ffcff

==
ifconfig
==
eth0 Link encap:Ethernet HWaddr 00:18:f3:cf:87:17
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
          Interrupt:18 Base address:0xd800

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:252 errors:0 dropped:0 overruns:0 frame:0
          TX packets:252 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:12600 (12.6 KB) TX bytes:12600 (12.6 KB)

wlan0 Link encap:Ethernet HWaddr 00:13:02:df:d5:8e
          inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:130870 errors:0 dropped:0 overruns:0 frame:0
          TX packets:96498 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:169336970 (169.3 MB) TX bytes:11857214 (11.8 MB)
==

As you can see, I don't have any drops of packets, so there's no need to alter MTU, as I read somewhere. And power management for wlan0 is set off.

Hope you can help, because I was looking for solution all over yesterday with no help at all. And the internet speed really pisses me off.

If any log needed, please just ask. Thank you.