Adafruit Ultimate GPS Breakout & Ethernet?

[RUInsane]

I'm trying to use this GPS breakout board on an Arduino Mega 2560 with an Ethernet shield. There seems to be some kind of bad interplay between the two. If I start the GPS module first the Ethernet card won't start. If I start the Ethernet shield first the GPS unit will error out. The only way to get them both running is if I start the GPS, get the location, put the GPS module to sleep, something I found in this forum entry -

viewtopic.php?f=19&t=28121

It seems like the constant chatter from the GPS module is interferring with the Ethernet shield. The problem now is that once the Ethernet class is started I can't shut it down to get location information again. So I can only get location information on start up (lame)

What am I missing?

[pburgess]

Are you drawing power from the USB port, or the DC jack? I'd suggest trying the latter, if that's not already being done.

[Stephanie]

How do you have the GPS connected to the Arduino? Are you using a hardware serial port on the Mega or softserial?

On the Mega, the ethernet shield uses pins 10, 50, 51, & 52, plus 53 is reserved. (even though the shield doesnt reach those pins, they are connected through the icsp port.)