I recently installed Xubuntu 12.04 on my Toshiba Satellite. To my dismay, I could not get a WiFi connection. I know the computer has WiFi, because it worked before. I can get a wired connection. I've even tried putting in a WiFi adapter and letting it connect over night. It still didn't work. It just keeps asking for my WiFi password. Why is this?
Have you rebooted your Toshiba any time recently? I had a similar issue with my ASUS netbook and realized that it only happened after it had been on for a long time. My settings were to lockscreen when the laptop lid is closed so it ran for long periods of time. I changed my power settings to suspend when the lid is closed and rebooted and this resolved my issue.