[Nouveau] Nouveau: kernel hang on Optimus+Intel+NVidia GeForce 1060m

[Nicolas Mercier]

Thanks Tobias, I tried this but unfortunately the only effect was thta the
boot was delayed by an additional 4 seconds :(
The original timeout is at
drivers/gpu/drm/nouveau/nvkm/subdev/secboot/ls_ucode_msgqueue.c
I tried to increase that timeout, but it did not seem to make a difference
either.

I think I get this error less often when I have a cable plugged in the
output of that card at boot, whereas I always get this error when I boot
without a monitor attached to the card.

On Wed, Sep 13, 2017 at 2:28 PM, Tobias Klausmann <
tobias.johannes.klausmann at mni.thm.de> wrote:

> Hi,
>
> the system fails to initialize your vbios using secureboot (i had a rare
> chance to on my system to witness it again), for now i traced it to
> acr_boot_falcon() in
> "linux/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0148cdec.c" where it
> throws -110 which is -ETIMEDOUT. You could try to increase the timeout
> and see if it helps something, similar to the following:
>
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.c
> b/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.c
> index 77273b53672c..fc0cb187d80d 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.c
> @@ -326,7 +326,7 @@ nvkm_msgqueue_post(struct nvkm_msgqueue *priv, enum
> msgqueue_msg_priority prio,
>         int ret;
>
>         if (wait_init && !wait_for_completion_timeout(&priv->init_done,
> -                                        msecs_to_jiffies(1000)))
> +                                        msecs_to_jiffies(5000)))
>                 return -ETIMEDOUT;
>
>         queue = priv->func->cmd_queue(priv, prio);
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0137c63d.c
> b/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0137c63d.c
> index fec0273158f6..c2ae525a0780 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0137c63d.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0137c63d.c
> @@ -279,6 +279,7 @@ acr_boot_falcon(struct nvkm_msgqueue *priv, enum
> nvkm_secboot_falcon falcon)
>                 u32 flags;
>                 u32 falcon_id;
>         } cmd;
> +       const struct nvkm_subdev *subdev = priv->falcon->owner;
>
>         memset(&cmd, 0, sizeof(cmd));
>
> @@ -290,7 +291,8 @@ acr_boot_falcon(struct nvkm_msgqueue *priv, enum
> nvkm_secboot_falcon falcon)
>         nvkm_msgqueue_post(priv, MSGQUEUE_MSG_PRIORITY_HIGH, &cmd.hdr,
>                         acr_boot_falcon_callback, &completed, true);
>
> -       if (!wait_for_completion_timeout(&completed,
> msecs_to_jiffies(1000)))
> +       nvkm_error(subdev, "waiting for timeout in acr_boot_falcon
> (msgqueue_0137bca5)\n");
> +       if (!wait_for_completion_timeout(&completed,
> msecs_to_jiffies(5000)))
>                 return -ETIMEDOUT;
>
>         return 0;
>
>
>
> On 9/13/17 11:37 AM, Nicolas Mercier wrote:
> > I am still looking for a solution. I have hacked around in the code
> > and found out the following:
> > - Nouveau prefers using PCIE power managemet over ACPI Optimus calls.
> > I tried to force it to use Optimus ACPI calls, but there was an error
> > calling the ACPI method so it bails out and uses PCIE PM anyway.
> > - I tried to debug the PCIE pm states which internally uses ACPI to
> > turn power on/off. I could print different statuses here and there.
> > When the power is switched off, ACPI calls turn the power off then the
> > kernel successfully puts the device in state D3Cold (also turning off
> > power to the PCI Express port). When waking up, ACPI turns the power
> > on, apparently successfully (Device [PEGP] transitioned to D0). But a
> > read from the PCI bus to get the power state & other flags return
> > 65535 (~0) and the kernel fails to set the device in D0 (although ACPI
> > claims it is in D0)
> > The call to pci_raw_set_power_state (in drivers/pci/pci.c) seems to
> > fail because pci_read_config_word returns "~0" (and does not return
> > any error code)
> >
> > I have tried different things; if I use pcie_port_pm=off, the NVidia
> > card goes to state D3Hot (if I am not mistaken, its PCIE port is still
> > powered) but that did not fix it. I tried to turn on or off different
> > PCI/PCIexpress features such as hotplug, PM and so on. The only thing
> > that works is that PM is fully disabled, which equals to the device
> > not being powered off, so that would be equivalent to nouveau.runpm=0,
> > which is not helping a lot. I have tried to force pcie aspm by
> > recompiling the ACPI table, still no luck.
> >
> > I am still taking a look, but it seems like the problem comes from the
> > PCIExpress PM functions and ACPI, not directly from Nouveau
> >
> > /n
>
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