[kwlug-disc] NVMe and PCIe ASPM ...

[Ron Singh]

I would be curious to know the CPU temp and fan speed at both settings of
"Performance> and <Balanced>, I wonder if the thermal paste needs to be
replaced after 6+ years of use?

The results of this command might shed some light --
inxi -s

*Ron S.*


On Thu, Mar 19, 2026 at 11:23 AM Khalid Baheyeldin <kb at 2bits.com> wrote:

> I alluded to this in a previous message, so here are the details.
>
> I got a used 2019 Intel NUC to replace the Raspberry Pi 4 that is
> running Home Assistant.
>
> The Pi worked well for many years, but after I moved WeeWx to it, one
> CPU is tied up for some time running only that.
> It still can cope, but I don't want to continue running from an SD card.
>
> So the NUC was equipped with a used M.2 NVMe SSD.
>
> But the machine would freeze after several hours, despite not running
> anything at all yet.
>
> I did testing for several days per iteration
>
> - Running from a 2.5" SSD in a USB case (works fine)
> - Same 2.5" SSD connected internally over SATA (works fine)
> - NVMe in a USB case (works fine)
> - NVMe internally via M.2 (this one hangs)
>
> As an experiment, I used CoPilot to see what can be done about this issue.
> It recommended several kernel parameters, such as:
>
> nvme_core.default_ps_max_latency_us=0
> nvme.noacpi=1
> nvme_core.force_apst=0
> pcie_aspm=off
>
> None of the above worked.
>
> I also tried updating the BIOS, but still, it froze after several hours.
>
> What worked was
> - Changing the BIOS "Power" profile from "Performance" to "Balanced"
> - Disabling "PCIe ASPM" (though one of the kernel parameters is
> supposed to do that)
>
> And that made the NUC very stable.
>
> Maybe this will help someone ...
> --
> Khalid M. Baheyeldin
>
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