MT32-pi won't boot on newest RPi 3 A+ models without firmware file upgrade 🐛 [BUG]

[mikelow]

Hardware and software

• mt32-pi version: v0.13.1
• Raspberry Pi model: Raspberry Pi 3 Model A+
• HATs: Mister MT32-pi Main (not relevant)
• USB devices: None
• MIDI host: Mister / USB Midi keyboard (not relevant)

Bug description

The latest Raspberry Pi Model 3 A+ (Revision 2) requires new firmware files that are not present in the current MT32-pi release. Without these files the RPi fails to boot. LEDs will turn on, and that's it. No OLED, no response to MIDI. Another user - the one who actually diagnosed and solved the problem - noticed a green LED blinking pattern indicating "Power Failure Type B". I didn't notice this but I may have missed it.

See this thread on the Mister FPGA forum

The fix is to replace the following files with those from the latest firmware release:

• fixup_cd.dat
• fixup4cd.dat
• start_cd.elf
• start4cd.elf

Steps to reproduce

1. Buy a new RPi Model 3 A+
2. Install MT32-pi
3. Despair

Expected behavior

MT-32 pi should boot.

Configuration file

I tried many permutations. None worked. Problem definitely requires the new firmware files.

Additional information

As a side note, in attempting to diagnose the problem, I could not download an HDMI debug build as they are all "expired" and unavailable for download. I wound up compiling it on my own, but it made no difference as the failure occurs before any HDMI signal is output.