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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+Lyude, Lukas, Karol

On 5/31/2023 6:40 PM, Nick Hastings wrote:
Hi,

* Nick Hastings <nicholaschastings@xxxxxxxxx> [230530 16:01]:
* Mario Limonciello <mario.limonciello@xxxxxxx> [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?

If it works in 6.4-rc, there are probably nouveau commits that need
to be backported to 6.1 LTS.

If it's still broken in 6.4-rc, I believe you should file a bug:

https://gitlab.freedesktop.org/drm/nouveau/


Lyude, Lukas, Karol

This thread is in relation to this commit:

24867516f06d ("ACPI: OSI: Remove Linux-Dell-Video _OSI string")

Nick has found that runtime PM is *not* working for nouveau.

If you recall we did 24867516f06d because 5775b843a619 was
supposed to have fixed it.




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