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I'm using the following set up to build an NTP Server:

  • Raspberry Pi B+
  • Raspberry PI GPS Add-on
  • FreeBSD 10.1 built with CrochetBSD

I am able to boot my Pi without the GPS Add-on. When I plug in the GPS Add-on into the GPIO connector, my Pi fails to boot before starting the kernel.

It shows up to the point where it says "Press enter to prevent auto boot" and then the letter 'L' shows up and starts erasing text from the screen.

Why would plugging in the GPS Add-on cause this and how do I begin to trouble shoot the boot sequence?

Piotr Kula
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RNikoopour
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1 Answers1

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It may be that the GPS module is interacting with the serial console.

Try disabling the serial console:

  • Remove console=ttyAMA0,115200 from /boot/cmdline.txt

  • Comment out the line T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100 in /etc/inittab

Craig
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