Asus G46VW with Slow WiFi Connection on Ubuntu 12.10
I have recently found a brain teaser on the Asus G46VW-BSI5N06 gaming ultrabook with Ubuntu 12.10 installed. The problem stems from its slow wireless connection to some routers. The laptop has an "Intel Centrino Wireless-N 2230" network card. Based on my experience, the slow connection persists on my 802.11g and 802.11n routers, but did not on two other unknown routers that I have access to. For example, here are the ping times to another LAN computer:
64 bytes from 192.168.1.247: icmp_req=251 ttl=128 time=56.8 ms
What's funny is that if you uninstall the driver and reinstall it on the command-line, the ping time immediately improves. On Ubuntu 12.10, that is done with the following command sequence:
sudo modprobe -rfv iwlwifi
The first command removes the Intel wireless driver, while the second line puts its back. Notice that configuration has not been touch at all between removing and inserting the driver. The following ping sequence shows the drastic improvement change:
64 bytes from 192.168.1.247: icmp_req=12 ttl=128 time=118 ms
The "Network is unreachable" messages occurs when the driver is being removed and reinstalled. Notice that after installing the driver, ping time immediately improves down to the single digit range. Why removing and reinstalling the Intel driver improves the performance of the card is a real mystery.
For now, the best work around I have is to put the uninstall and install sequence into /etc/rc.local file. That way, it'll uninstall and re-install itself after every boot. A delay is necessary for this to work. I use thirty seconds. The following is what I put into the /etc/rc.local file:
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