https://bugs.freedesktop.org/show_bug.cgi?id=107729
--- Comment #1 from Ilia Mirkin imirkin@alum.mit.edu --- (In reply to Alexey from comment #0)
[20747.330911] nouveau 0000:01:00.0: fifo: DMA_PUSHER - ch 7 [minetest[12365]] get 000003a100 put 0000080cc8 ib_get 000001f6 ib_put 000001f9 state 800075e0 (err: INVALID_CMD) push 00406040
This is indicative of some sort of error processing commands, anything that happens after that is just indicative of the screwup.
The 406040 error is a long-standing issue on Tesla-family GPUs. Still no idea what goes wrong.