Wireless losing connection in Hoary

[Adam]

Hey all-

Joined the list a couple weeks ago, seen a lot of great stuff. I am 
currently running K/Ubuntu on a Sony Vaio A170 laptop. Under Warty, the 
Intel Wireless adapter that's onboard worked perfectly. Under Hoary, it 
works, but at some point it just flat out stops working.

Here's what I've done so far (after the Hoary upgrade):
-checked to make sure something wasn't powering down the adapter to save 
power
-manually configured the wireless adapter, setting up a configuration to 
attach to my access point by default

I've verified with other systems that the wireless access point is 
working as it should. Only Hoary seems to lose connection, and then is 
unable to re-estblish it. I can scan for networks, find those in range, 
but it will not connect.

I did notice in the KDE Control Center a section under "System 
Administration" called "Sony Vaio Laptop." In that panel it reads 
"Cannot find the Sony Programmable Interrupt Controller. If this is a 
Sony Vaio laptop, make sure the sonypi driver module loads without 
failures."

Could this be the direction I need to look? Is it possible that the lack 
of that driver module is causing issues with the wireless adapter?

Thanks in advance for any advice.

Adam