Nrf Connect SDK (and Power Profiler) works then after a while stop recognize devices : need restart computer

[AloisKyrou]

Hello everyone,

I'm working on Nrf COnnect SDK with nrf52832DK. I also have a Power Profiler Kit that I use for different things. 
I'm on Windows 11 Home version 24H2 OS build 26100.4652.

Randomly while I'm using the device kit or the power profiler kit, they stop being recognize by the Nordic softwares. They still are register as COM port for both Jlink interfaces. 
My guess is that there is an issue with the Jlink driver that no longer allox the apps to comunicate with the devices. 

I'm using Jlink's installation provided with the Nordic software (v8.18). 

When I'm in a failure case, I need to restart my computer.

1) If you have a better / faster way to resolve this I'd love to hear about it ? 
2) Maybe this is a known issue and you have a solution for me ? 

Thanks in advance and have a nice weekend,
Regards,

Aloïs KYROU

[tesc]

Hi,

In my experience, issues like this are typically caused by software changes, driver changes, or for a new DK which has not been used previously. I have not seen before that it suddenly stops working like this, without other changes to the computer, and that things start working again after a reboot.

Nevertheless, here are some things which may solve or improve the situation:

1. I know that there has sometimes been issues with J-Link drivers in conjunction with docking stations and/or USB hubs. If you have connected the boards through either of those, please see if you can try to connect directly to the PC instead, and see if that improves things.

2. Another thing you could try, is to install the latest J-Link Software and Documentation Pack from Segger. Especially if you have a new DK revision, but the occasional patches and bugfixes do tend to make things more stable with newer J-Link software versions, for all boards.

3. Please also check that the USB cables are working; for instance by changing to a different USB cable to see if the situation improves.

4. Sometimes, typically with Windows, things can break if you have Mass Storage Device (MSD) enabled on the programmer MCU of the board. This can be  turned off through J-Link Commander, which is part of the J-Link Software and Documentation Pack. Open J-Link Commander, connect to the board, and use the command MSDDisable, to disable MSD. Then turn the DK off and back on again. If you should ever have the need to reenable MSD, then you can do so with J-Link Commander and the command MSDEnable.

Other than the above four suggestions, it is hard to tell what to do in order to mitigate the issue. If nothing of the above works, please let us know and we can look further into if anything can be done.

Regards,
Terje