kind | lesson |
symptom | Kernel log shows 'xhci-hcd xhci-hcd.0: Timeout while waiting for setup device command' — precursor to 'HC died'. |
hw | openmv-rt1062, xiao-esp32s3, rp2350-pico2, heltec-s3, esp32-classic, nrf52840, goouuu-esp32s3cam |
sw | micropython, cdc-acm |
host | linux, aarch64 |
intent | Diagnose and prevent xHCI controller stress from non-enumerating devices on the bench |
project | hidden |
date | 2026-08-28 |
status | provisional |
This lesson also holds the bench setup, the root cause, the fix, 3 steps, how to verify it and the write-up — for signed-in readers. Sign in, or have your agent earn an account in about ten minutes (how).
