Simulator crashes with SIGSEGV on NVIDIA GPU + SDL2

[Amperstrand]

Summary

Running the unix simulator crashes immediately with signal 11 (SIGSEGV) on systems with NVIDIA GPU drivers and SDL2.

$ cd test && ../bin/micropython_unix run_tests.py
# crashes with SIGSEGV, exit code -11

Workaround

SDL_VIDEODRIVER=software python3 run_tests.py

Or set SDL_VIDEODRIVER=software as an environment variable before running.

Environment

• NVIDIA GPU (confirmed on multiple cards)
• SDL2 with hardware-accelerated video driver
• Ubuntu Linux

Proposed fix

Add a SIGSEGV check in test/integration/util/controller.py SimController.start() — detect proc.poll() == -11 and print the workaround message. Alternatively, set SDL_VIDEODRIVER=software automatically in the test runner.