Treo 755p goes into boot cycle when connected to F10 over USB

I have a Palm Treo 755p. Up until recently, I could connect the Treo to my Dell D830 running F10 and hotsync, or I could run Mobile Stream's USBModem app on the Treo and establish a ppp internet connection. Recently, when I make the USB connection from the phone to the laptop, the phone goes into an immediate, endless boot cycle. I know this could be the result of a million different things, but I was wondering if anybody out there had any suggestions. (2.6.27.19-170.2.35.fc10.i686 #1 SMP) I have tried all sorts of permutations of hotsyncing and modem usage over USB or bluetooth with various computers. I can hotsync the phone with my D830 over bluetooth, but I haven't figured how to do the bluetooth ppp configuration. USBmodem and hotsync work over USB on an Asus Z71a running XP. If I boot the Asus into F9 and connect the phone over USB, the phone doesn't reboot, but the pppd script doesn't run to completion. I also have an eee 1000, and I see either the phone rebooting or just the pppd failure, depending on what distribution I'm running. I prefer USB, but I would try Bluetooth for dial-up, if somebody could point me towards good directions. I would even change the distro on my Asus or eee if that was a solution. Thanks in advance, Mark