Raspberry pi troubleshooting

If you run into something that might help others, add it here!

• Are you using the Raspbian Raspberry Pi image? The soft-floating-point wheezy is not compatible with openFrameworks. ArchLinux support is planned, but not currently supported.
• Are you giving your RPI enough power? Many otherwise inexplicable RPI problems seem to be the result of inadequate power. See here for more for information on Power Supply Problems
• Are you running into problems with a USB device? Please reference the list of Verified Peripherals.
• If your USB device isn't listed and is failing please follow these steps to gather useful log information from the pi:

0. rm /var/log/kern.log /var/log/kern.log.1 /var/log/kern.log.*.gz
1. shutdown -r now
2. run your oF App
3. lsusb -v | grep -iP "Transfer Type.*(Interrupt|Isochronous)" | wc -l
4. cat /var/log/kern.log | grep -iP "fail|warn|error" | perl -p -e 's/^[^]\n]*]//g;s/(warn_alloc_failed: )[0-9]+/$1/g' | sort -u;
5. dmesg
6. copy and paste the output to a gist

• For more information on debugging USB devices please reference the Rpi USB check-list
  
  
• Building oF core hangs on ofColor on RPI 256mb?

1. Edit /boot/config.txt and add or set option "gpu_mem=64". This resets the memory split to 192mb for cpu_mem, reboot after saving file (to edit: $sudo nano /boot/config.txt) ($sudo reboot).
2. Compile the oF core and app using "$make Debug" instead of a release build with "$make".
3. More info see: https://github.com/openFrameworks-RaspberryPi/openFrameworks/issues/118