Re: 4.3 nouveau regression: nv04_fbcon_imageblit(?) deadlock

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On Thu, Nov 26, 2015 at 12:10 PM, Meelis Roos <mroos@xxxxxxxx> wrote:
> Hello, this is a report about a PC with 3 nvidia cards - PCI-E NV44, AGP
> NV34 and PCI NV05. Only NV44 has monitor attached currently.
>
> 4.2.0 (both packaged and self-compiled) worked fine, 4.3.0 and 4.4-rc2
> exhibit a problem: after the system has started up, I start getting
> messages like INFO: task kworker/0:2:652 blocked for more than 120
> seconds. where nv04_fbcon_imageblit and nouveau_pmops_runtime_suspend
> show up in trace. The trace keeps reappearing, also breaking lspci and
> clean reboot (they hang).
>
> dmesg from 4.4-rc2, drm-debug=0xe
> http://kodu.ut.ee/~mroos/download/dm-nouveau-4.4-rc2
>
> dmesg from 4.2.0, drm.debug=0xe
> http://kodu.ut.ee/~mroos/download/dm-nouveau-4.2
>
> lspci -vvv
> http://kodu.ut.ee/~mroos/download/lspci.nouveau
>
> config:
> http://kodu.ut.ee/~mroos/download/nouveau-config
>
> Is there anything else I can provide?

Runtime pm shouldn't be a thing for these GPUs... can you see if
booting with nouveau.runpm=0 fixes it? Sounds like we reintroduced
some problem for GPUs that don't have optimus-style acpi power off
hooks.

  -ilia
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