Comment # 9
on bug 108500
from Timo Wiren
(In reply to Ilia Mirkin from comment #8) > Could you edit > drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv50.c:nv50_vmm_valid, and change > it to set aper = 0 in the if (ram->stolen) case (so aper=0 in both of the > VRAM cases). I tested it on kernel 4.18.16 and it caused a crash/hang on bootup. Some of the log messages (copied by hand): nouveau 0000:04:00.0: fb: trapped read at 015bc9dedc on channel 2 [0fba0000 DRM] engine 05 [PFIFO] client 08 [PFIFO_READ] subclient 00 [PUSHBUF] reason 0000000b [PT_NOT_PRESENT] nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 2 [DRM] get 015c25a7a4 put 015c25a7a4 ib_get 000000a2 ib_put 000000a7 state a0000000 (err: IB_EMPTY) nouveau 0000:04:00.0: DRM: GPU lockup - switching to software fbcon nouveau 0000:04:00.0: fb: trapped write at 0100131fc0 on channel -1 [0fedf000 unknown] engine 06 [BAR] client 04 [PFIFO_WRITE] subclient 01 [IN] reason 000000b [VRAM_LIMIT]
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