Lucid Puppy 5.1 puplet hangs on boot loading USB module

[kentchristopher]

Old desktop: AMD Athlon XP processor, 256MB RAM, 30GB hard drive

I've done a frugal install of Browser Linux 5.0.1 to the hard drive (ext4 partition) and done some customizations to jwmtray and installed Google Chrome. Nothing major.

If I shutdown the computer, the next time it boots, it hangs on the message:

"waiting for modules to complete loading... usb"

I kill the power, start the computer again it boots up fine, and if I select "Reboot" from the shutdown menu, it boots up fine.

So, it seems that something is going wrong in the shutdown process - and yet it's being fixed on the 2nd boot attempt (strange).

Any ideas?