Portable USB4 NVMe SSD stays on all the time

Troubleshooting
1

I am using DietPi v9.13.2 on a cirrus7 nimbini v4 Pro Edition (Based on Intel NUC13ANHi7) with Roon and Asset UPnP. It works just fine - Thanks.

As backup (DietPi and music files) I use OWC Express 1M2 (Portable USB4 NVMe SSD). It also works fine.

There is just a small problem: When I turn off the NUC13ANHi7 the OWC Express 1M2 don’t turn off (power stays on). Have done a test with OWC Express 1M2 under Windows 11 and when I turn-off the Windows PC the OWC Express 1M2 also turns-off.

Is there a way to fix it?

Thanks

Torben

OWC Express 1M2
OWC Express 1M21920×1071 150 KB

2

To have USB ports power down when the OS is off, you usually have to set it in the BIOS/UEFI.

So you’d have to reboot and go into the BIOS by hitting F2 (probably, though I’m not sure for this model).

Go to power management, find a setting labeled EUP or ERP and enable it, and save the settings.

3

The strange thing is, that I have not done that on a Windows 11 PC. Here it power down when the OS turns off. No change in BIOS is done

4

I guess your Windows system is running on a different hardware?

5

Testet on the same hardware. Works just fine under Windows but not under DietPi.

6

How does it behave on regular Debian?

7

Can’t tell - I am just using DietPi on a headless PC

8

Would be good to know how Debian behaves. At the end, DietPi is a Debian with some shell scripting on top.

10

Is the windows pc set to Fast Startup (Default is True) then the computer does not truly shutdown when you choose shutdown, this with the power setting of “USB selective suspend setting” set to true will power down the usb ports when going into the hybrid hibernation that Fast startup entails.

11

Since indeed USB-always-on is usually a BIOS setting, did you check BIOS (or UEFI) settings for such? E.g. my laptop has this for one of its USB A ports, so I can use it as large power bank when travelling :sweat_smile:.

12

It is possible to disable USB-A, but not USB-C.

Setting “Portable Device Charging mode” to off did not change the problem

IMG_3393
IMG_33931920×1440 182 KB

BIOS3
BIOS31243×978 256 KB

13

After updating firmware to 0.38 and enabling “Deep Power Saving Mode” it works.

But is has its has its price: Now Wake-On-LAN is not working. The Wake-On-LAN and Deep Power Saving mode can’t be active on the same time, since they will conflict with eachother

BIOS 23062025
BIOS 230620251920×1183 146 KB