Welcome to Linux!
You get a lot of credit for getting through your first install and getting the wireless working.
Wireless drivers have always been a bug-a-boo for Linux, particularly on laptops, because many mfgs don't
release their source (ever) or don't release it till long after Microsoft has them. In general,
ndiswrapper is a cluge, if you can find native drivers for your hardware, it will probably work better.
In general, Linux will always work better for you on couple-year-old hardware rather than the bleeding edge stuff.
But you made it work ... good!
Here are some general tricks you should know. I think they will get your connection back without requiring a reboot.
First, you should have
wireless-tools installed. Ubuntu has a nice package manager, but I am used to
working from the command line, and it's easier to explain command line stuff in fora like this one.
So for you Ubuntuan's,
sudo apt-get install wireless-tools. If you are using Oneiric, you probably already
have it installed.
Next, try
iwlist scanning. Here's what I get when I do that,
wlan0 is my wifi card:
Code:
root@elrond:/home/richard# iwlist scanning
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: 00:18:39:4E:53:25
Channel:3
Frequency:2.422 GHz (Channel 3)
Quality=58/70 Signal level=-52 dBm
Encryption key:off
ESSID:"your_home_network_here"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Mode:Master
Extra:tsf=00000353940848e8
Extra: Last beacon: 8ms ago
IE: Unknown: 0007636F6479303037
IE: Unknown: 010482848B96
IE: Unknown: 030103
IE: Unknown: DD06001018020014
If your network is down, you may get this instead:
Code:
root@elrond:/home/richard# iwlist scanning
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wlan0 Interface doesn't support scanning : Network is down
To bring your network back up, try
sudo /etc/init.d/networking restart
See if that just does not do it! It at least saves a reboot!
That command brings up a "warning". Ignore it if it works for you.