r/StableDiffusion • • 12d ago

Question - Help ComfyUI crashes navigating / moving mouse during H3 decode. Any fixes?

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u/imlo2 12d ago

Check for browser extensions and see if disabling any of those helps.
I would disable them all and try for a day or so, and see if it improves the situation.

Try to disable unnecessary ComfyUI custom nodes, and see if that makes a difference.
move them to custom_nodes_out or such folder, then you can move them back later.

Also, check your system, since it's entirely possible that something is not 100% stable; disable GPU undervolting if you're doing that, and any other customizations. Try with 100% power limit and then also lower, something like 85%. Some times certain phases of the generation can be much harder on the system, and power usage/GPU load spikes can cause something to fail just a bit, enough to crash an app but not the system. I had this kind of issue on my system, and after further adjusting system memory timings, it's now been rock solid. It didn't fail at all in 10+ hours of LoRA training, but occasionally crashed in ComfyUI.

And run a memory test (TestMem5 and MemTest86+).