NVMe power issue?
#1
Hi all,

I've just experienced what appears to be a power issue with the VCC3V3_SSD and probably also the VCC3V3_SYS rail. When my battery is below 40 % communication with the NVMe SSD fails on bootup. This manifests itself in either kernel warnings on bootup and a kernel panic as soon as i enter lspci or a kernel panic immediately on bootup.

My current theory is that during probing of partitions on the NVMe SSD the SSD enters a high power mode and U3 can't keep [font=sans-serif]VCC3V3_SYS at 3.3 V.[/font]
The SSD I'm using is a Corsair MP510. Its supported power states are

Code:
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
0 +     6.80W       -        -    0  0  0  0        0       0
1 +     5.74W       -        -    1  1  1  1        0       0
2 +     5.21W       -        -    2  2  2  2        0       0
3 -   0.0490W       -        -    3  3  3  3     2000    2000
4 -   0.0018W       -        -    4  4  4  4    25000   25000

I'm in general somewhat puzzled about how the Pinebook Pro is supposed to stay operational when the battery is low. The discharge cutoff voltage of the battery is specified as 2.75 V. However U3 is just a step-down regulator. Thus it won't be able to maintain VCC3V3_SYS at 3.3 V once the battery discharges below 3.3 V.

Has anybody else experienced anything similar yet?
Manjaro ARM

Kernel dev
Buy me a coffee


Messages In This Thread
NVMe power issue? - by tsys - 11-21-2019, 07:49 PM
RE: NVMe power issue? - by hmuller - 11-22-2019, 11:50 AM
RE: NVMe power issue? - by belfastraven - 12-24-2019, 01:27 PM
RE: NVMe power issue? - by tsys - 11-24-2019, 01:37 PM
RE: NVMe power issue? - by hmuller - 11-27-2019, 08:23 AM
RE: NVMe power issue? - by tsys - 11-27-2019, 08:32 AM
RE: NVMe power issue? - by hmuller - 12-07-2019, 01:42 PM
RE: NVMe power issue? - by Arwen - 12-07-2019, 02:01 PM
RE: NVMe power issue? - by tsys - 12-07-2019, 02:15 PM
RE: NVMe power issue? - by hmuller - 12-07-2019, 02:56 PM
RE: NVMe power issue? - by hmuller - 12-18-2019, 04:01 PM
RE: NVMe power issue? - by tsys - 12-19-2019, 08:22 AM
RE: NVMe power issue? - by Arwen - 12-19-2019, 05:38 PM
RE: NVMe power issue? - by hmuller - 12-25-2019, 08:04 PM
RE: NVMe power issue? - by zaius - 12-26-2019, 01:34 PM
RE: NVMe power issue? - by tophneal - 12-26-2019, 01:38 PM
RE: NVMe power issue? - by as400 - 12-26-2019, 09:41 AM
RE: NVMe power issue? - by belfastraven - 12-26-2019, 12:51 PM

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