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Date:   Fri, 2 Jun 2023 08:55:11 +0900
From:   Nick Hastings <nicholaschastings@gmail.com>
To:     "Limonciello, Mario" <mario.limonciello@amd.com>
Cc:     Lyude Paul <lyude@redhat.com>, Lukas Wunner <lukas@wunner.de>,
        kherbst@redhat.com, Salvatore Bonaccorso <carnil@debian.org>,
        1036530@bugs.debian.org, "Rafael J. Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>, linux-acpi@vger.kernel.org,
        linux-kernel@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: Regression from "ACPI: OSI: Remove Linux-Dell-Video _OSI
 string"? (was: Re: Bug#1036530: linux-signed-amd64: Hard lock up of system)
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Hi,

* Limonciello, Mario <mario.limonciello@amd.com> [230602 01:18]:
> +Lyude, Lukas, Karol
> 
> On 5/31/2023 6:40 PM, Nick Hastings wrote:
> > 
> > * Nick Hastings <nicholaschastings@gmail.com> [230530 16:01]:
> > > * Mario Limonciello <mario.limonciello@amd.com> [230530 13:00]:
> > <snip>
> > > > As you're actually loading nouveau, can you please try nouveau.runpm=0 on
> > > > the kernel command line?
> > > I'm not intentionally loading it. This machine also has intel graphics
> > > which is what I prefer. Checking my
> > > /etc/modprobe.d/blacklist-nvidia-nouveau.conf
> > > I see:
> > > 
> > > blacklist nvidia
> > > blacklist nvidia-drm
> > > blacklist nvidia-modeset
> > > blacklist nvidia-uvm
> > > blacklist ipmi_msghandler
> > > blacklist ipmi_devintf
> > > 
> > > So I thought I had blacklisted it but it seems I did not. Since I do not
> > > want to use it maybe it is better to check if the lock up occurs with
> > > nouveau blacklisted. I will try that now.
> > I blacklisted nouveau and booted into a 6.1 kernel:
> > % uname -a
> > Linux xps 6.1.0-9-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.27-1 (2023-05-08) x86_64 GNU/Linux
> > 
> > It has been running without problems for nearly two days now:
> > % uptime
> >   08:34:48 up 1 day, 16:22,  2 users,  load average: 1.33, 1.26, 1.27
> > 
> > Regards,
> > 
> > Nick.
> 
> Thanks, that makes a lot more sense now.
> 
> Nick, Can you please test if nouveau works with runtime PM in the
> latest 6.4-rc?

I reported this twice already. I guess it was lost since for some
reason emails in this thread are not being trimmed. I'll repeat here:

I did eventually see a lockup of this kernel. On the console I saw:

[  151.035036] vfio-pci 0000:01:00.0 Unable to change power state from D3cold to D0, device inaccessible

I did not see the other two lines that were present in earlier lock ups.

Regards,

Nick.