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 Tests: Benchmark Results and Comparisons Across GPUs(88 posts)→
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