Re: kern/51577 (7.99.40 (and older) i386 kernels freeze when nouveau is enabled)

["David H. Gutteridge" <david%gutteridge.ca@localhost>]

The following reply was made to PR kern/51577; it has been noted by GNATS.

From: "David H. Gutteridge" <david%gutteridge.ca@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/51577 (7.99.40 (and older) i386 kernels freeze when nouveau
 is enabled)
Date: Tue, 22 Aug 2023 18:00:45 -0400

 On 2023-08-20 02:37, riastradh%NetBSD.org@localhost wrote:
 > Synopsis: 7.99.40 (and older) i386 kernels freeze when nouveau is 
 > enabled
 > 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: riastradh%NetBSD.org@localhost
 > State-Changed-When: Sun, 20 Aug 2023 06:37:15 +0000
 > State-Changed-Why:
 > Any chance you can still reproduce this one?  Lotta fixes since then.
 
 There's another significant incremental improvement. That is, the
 console now works (albeit it is weirdly faint), at least to the point I
 was interacting with it. Then I tried an X session, which also worked
 flawlessly for about a minute, then the screen got scrambled and it
 seems unable to redraw anything (mouse clicks do not result in anything
 being re-rendered, for instance).
 
 Initial dmesg output is:
 
 [   2.4670916] kern.module.path=/stand/i386/10.99.7/modules
 [   2.4670916] nouveau0: NVIDIA NV11 (011000b2)
 [   2.4970932] nouveau0: bios: version 03.11.01.24.00
 [   2.4970932] nouveau0: interrupting at irq 10 (nouveau0)
 [   2.4970932] nouveau0: notice: tmr: unknown input clock freq
 [   2.5071036] nouveau0: fb: 32 MiB SDRAM
 [   2.5071036] Zone  kernel: Available graphics memory: 27182 KiB
 [   2.5071036] nouveau0: DRM: VRAM: 31 MiB
 [   2.5071036] nouveau0: DRM: GART: 128 MiB
 [   2.5071036] nouveau0: DRM: BMP version 5.20
 [   2.5071036] nouveau0: warn: DRM: No useful DCB data in VBIOS
 [   2.5071036] nouveau0: DRM: MM: using M2MF for buffer copies
 [   2.5071036] nouveau0: DRM: Saving VGA fonts
 [   2.5470936] nouveau0: warn: DRM: No useful DCB data in VBIOS
 [   2.5470936] [drm] Supports vblank timestamp caching Rev 2 
 (21.10.2013).
 [   2.5470936] [drm] Driver supports precise vblank timestamp query.
 [   2.5870984] nouveaufb0 at nouveau0
 [   2.5870984] [drm] Initialized nouveau 1.3.1 20120801 for nouveau0 on 
 minor 0
 [   2.5870984] nouveaufb0: framebuffer at 0xd8008000, size 1920x1080, 
 depth 8, stride 2048
 
 At the point the screen scrambles and freezes, we then get:
 
 [ 170.0896665] nouveau0: autoconfiguration error: error: fifo: 
 DMA_PUSHER - ch 1 [user] get 0002b000 put 0001eda0 state 80000000 (err: 
 INVALID_CMD) push 00000000
 
 Last time around enabling debugging didn't yield anything extra, but I
 could try again.
 
 Thanks,
 
 Dave