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Nouveau not initializing correctly with stock kernel of NetBSD 10.0.0



Hello All,

i am trying to get a framebuffer and possibly accelerated x11 on an
amd64 box using nouveau.
The GPUs i tried are an old PCIe 8400GS and a GTS250.

So far i had no success with a fresh install of NetBSD 10.0.0 and the
stock kernel, the monitor output freezes after this line, and never
comes back to life - i also cannot switch to other consoles or bring
up x11:

[     1.000000] NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024
[     1.000000]
mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC
...
[     4.351708] kern.module.path=/stand/amd64/10.0/modules
[     4.351708] nouveau0: NVIDIA G92 (092a80a2)
[     4.481827] nouveau0: bios: version 62.92.9a.00.00
[     4.501837] nouveau0: interrupting at msi1 vec 0 (nouveau0)
[     4.501837] nouveau0: fb: 1024 MiB GDDR3
[     4.577621] Zone  kernel: Available graphics memory: 9007199254225440 KiB
[     4.577621] nouveau0: DRM: VRAM: 1024 MiB
[     4.577621] nouveau0: DRM: GART: 1048576 MiB
[     4.581910] nouveau0: DRM: TMDS table version 2.0
[     4.581910] nouveau0: DRM: DCB version 4.0
[     4.581910] nouveau0: DRM: DCB outp 00: 04011310 00000028
[     4.581910] nouveau0: DRM: DCB outp 01: 02000300 00020028
[     4.581910] nouveau0: DRM: DCB outp 02: 01000302 00020030
[     4.581910] nouveau0: DRM: DCB outp 03: 02022322 00020010
[     4.581910] nouveau0: DRM: DCB conn 00: 00001030
[     4.581910] nouveau0: DRM: DCB conn 01: 00000100
[     4.581910] nouveau0: DRM: DCB conn 02: 00002261
[     4.581910] nouveau0: DRM: MM: using CRYPT for buffer copies
[     4.581910] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[     4.581910] [drm] Driver supports precise vblank timestamp query.
[     4.621920] nouveaufb0 at nouveau0
[     4.621920] [drm] Initialized nouveau 1.3.1 20120801 for nouveau0 on minor 0

However the system comes up and i can ssh into it. So dmesg gives the
following additional info after the output freeze above - including a
few timeouts:

[     4.621920] [drm] Initialized nouveau 1.3.1 20120801 for nouveau0 on minor 0
[     4.621920] nouveaufb0: framebuffer at 0xc0006000, size 1920x1200,
depth 32, stride 7680
[     6.623293] nouveau0: autoconfiguration error: error: DRM: core
notifier timeout
[     8.624667] nouveau0: autoconfiguration error: error: DRM: base-0: timeout
[     8.654687] wsdisplay0 at nouveaufb0 kbdmux 1: console (default,
vt100 emulation), using wskbd0
[     8.654687] wsmux1: connecting to wsdisplay0
[     8.654687] wskbd1: connecting to wsdisplay0
[    45.850161] wsdisplay0: screen 1 added (default, vt100 emulation)
[    45.850161] wsdisplay0: screen 2 added (default, vt100 emulation)
[    45.850161] wsdisplay0: screen 3 added (default, vt100 emulation)
[    45.850161] wsdisplay0: screen 4 added (default, vt100 emulation)

My only succesfull option to get a working console output and to start
up x11 was to build a kernel without nouveau and only the generic
framebuffer. Of course then i don't have accelerated opengl in x11.

Can someone help or give some insights on what can i do to bring up
nouveau successfully?

Best regards,
Connor


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