Comment-only. Moving the esp-hosted transport buffers off PSRAM (MEMPOOL_PREFER_SPIRAM=n), to keep the radio's SDIO DMA off the DSI's bus and stop it starving the framebuffer read, was tried against the flicker — but it exhausts internal RAM and boot-loops in esp-hosted init before Wi-Fi comes up. Documented so it isn't retried; the setting stays =y. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LKPbR6DY2JygHbyLjxm7Uu