MiniMax H3 hard-locks Ubuntu on RTX 3060 unless pinned memory is disabled
Able-Instruction1009 · reddit · 2026-08-04
A user reports that MiniMax H3 can hard-freeze an Ubuntu machine on an RTX 3060 setup because ComfyUI reserves a huge pinned-memory pool, not because of a normal CUDA OOM.
What happened
- Setup: RTX 3060 12GB, 32GB RAM, Ubuntu 24.04, ComfyUI 0.30.0.
- Symptom: the entire system locked up instead of throwing a clean GPU memory error.
- Root cause: about 30GB of pinned memory on a 32GB machine, which the kernel cannot reclaim, leading to swap livelock.
Fix that worked
- --lowvram
- --reserve-vram 1.5
- --disable-pinned-memory
- --disable-smart-memory
- --cache-none
- --fast-disk
Result
- 480p 16:9, 5s at 24fps with native audio from one reference image.
- Peak usage: 7.4GB RAM, 6.2GB of 11.9GB VRAM.
- No swap activity, and the machine stayed responsive.
Related event: MiniMax H3 Local Deployment Faces Severe OOM and Resource Issues(7 posts)→
More from Infra
- Nuclear Startup Valar Raises $1B Led by Sequoia to Scale Reactors — kleffew94 · 2026-08-04
- AI API revenue still trails hyperscaler capex by a wide margin in 2025 chart — SurpriseDog9000 · 2026-08-04
- U.S. heartland backlash grows as AI data centers reshape local communities — altryne · 2026-08-04
- Semiconductors and data centers are being built far slower than AI demand — robleclerc · 2026-08-04
- Gemma 4 31B can use over 13× more KV-cache memory than DeepSeek V4 Flash — teortaxesTex · 2026-08-04
- MCP server brings structured compile, flash and stateful GDB to embedded boards — Historical_Court795 · 2026-08-04