Messages in this thread | | | Date | Thu, 7 Dec 2023 15:21:55 +0100 | Subject | Re: [PATCH] nvme-pci: Add sleep quirk for Kingston drives | From | Georg Gottleuber <> |
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Am 06.12.23 um 10:24 schrieb Christoph Hellwig: > What does save a lot of power mean, and why does it only apply to > some platforms? I suspect the more likely case is that APST is > simply completely broken on this device?
Hello,
power consumption in s0ix varies depending on mainboard and NVMe SSD. Some examples: Board, nvme(id), mW w/o patch, mW with patch, kernel NS5X_SN7XAU, 0x500f, 2691mW, 487mW, 6.2.0 NS5X_SN7XAU, 0x2263, 2262mW, 741mW, 6.2.0 PH4PRX1_PH6PRX1, 0x2263, 3042mW, 760mW, 6.2.0 NS5X_SN7XPU, 0x500f, 3135mW, 779mW, 6.5.0
All measurements were taken with the battery disconnected and a modified adapter plug.
I don't have a deeper insight into APST to judge whether something is not working. But all other NVMe SSDs we have tested sleep with a power consumption below 2W (Samsung 970 Evo, Samsung 980, Corsair MP600 PRO NH, other Kingston NV1 with ID != 0x500f).
We originally noticed that newer Kingston NV1 (with id 500f) led to higher standby consumption. With some trial and error I came to the conclusion that the problem lies with 'Simple Suspend'.
Kind regards,
Georg Gottleuber
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