nrf connect desktop app blank screen

[gorazd]

I have read the related issues, none of them provided a solution for me. There was one answer which suggested to downgraded libstdc++6 as a solution without giving any specific instructions on how to do that, what version etc.

So, the 'Bluetooth low energy app' is suddenly starting with blank screen after trying to flash the firmware at the start. Other apps work fine (e.g. power profiler).

I am on Ubuntu 22.04.2 LTS 64bit using nrfconnect-4.1.2-x86_64.AppImage, nrf-command-line-tools_10.23.0_amd64.deb

I would like to use the app to perform dfu upgrades. I also tried that with nrfutil (nrfutil 7.1.0 (c86ddc2 2022-11-29)):

nrfutil device program --firmware dfu_mtk_v0.11.3_7b555.zip --serial-number 1050312843

gorazd@gorazd-Victus-by-HP-Laptop-16-e0xxx:~/Programs/nrf-rust/firmware$ nrfutil device program --firmware dfu_mtk_v0.11.3_7b555.zip --serial-number 1050312843
[00:00:02] ------   0% [2/3 1050312843] Failed, [jlink] INTERNAL_ERROR
Error: One or more program tasks failed

Enter your choice: : 0
  [------------------------------------]    0%
Traceback (most recent call last):
  File "nordicsemi/__main__.py", line 1555, in <module>
  File "click/core.py", line 1137, in __call__
  File "click/core.py", line 1062, in main
  File "click/core.py", line 1668, in invoke
  File "click/core.py", line 1668, in invoke
  File "click/core.py", line 1404, in invoke
  File "click/core.py", line 763, in invoke
  File "nordicsemi/__main__.py", line 1215, in ble
  File "nordicsemi/dfu/dfu.py", line 115, in dfu_send_images
  File "nordicsemi/dfu/dfu.py", line 88, in _dfu_send_image
  File "nordicsemi/dfu/dfu_transport_ble.py", line 474, in open
  File "nordicsemi/dfu/dfu_transport_ble.py", line 103, in open
  File "pc_ble_driver_py/ble_driver.py", line 106, in wrapper
pc_ble_driver_py.exceptions.NordicSemiException: Failed to open. Error code: NRF_ERROR_TIMEOUT
[75261] Failed to execute script '__main__' due to unhandled exception!

[runsiv]

Hi, 

The supported version with the app should be

JLink_V7.66a. The developer has also tested with JLink_V7.80c. Can you try if this works for you?

Regards

Runar

[Aleks]

I have the same problem ,with the white-screen suddenly popping up after at least one year of usage on Ubuntu 22.04.3 LTS and this is the output I get from the nRF Connect BLE application:

10:33:01.092 Using JLink version: JLink_V7.80c

10:33:01.121 Installed JLink version does not match the provided version (V7.66a)

So the application starts and it is possible to select the nRF connect device in the device drop-down list, but get a white-screen as soon as this is chosen. In my dmesg I can see this:

[ 1811.420595] nrfconnect-blue[5370]: segfault at 0 ip 00007fdebf28842b sp 00007fdeb99faba8 error 4 in libstdc++.so.6.0.30[7fdebf250000+111000]
[ 1811.420615] nrfconnect-blue[5386]: segfault at 0 ip 00007fdebf28842b sp 00007fdeb4bba658 error 4

[ 1811.420626] Code: 0f 1f 80 00 00 00 00 31 d2 e9 14 ff ff ff 90 49 89 f0 48 8b 0f 48 8b 77 08 48 89 fa b8 fe ff ff ff 48 29 ce 0f 84 8a 00 00 00 <0f> b6 01 83 f8 7f 0f 86 89 00 00 00 3d c1 00 00 00 76 72 3d df 00
[ 1811.420636] in libstdc++.so.6.0.30[7fdebf250000+111000]
[ 1811.420646] Code: 0f 1f 80 00 00 00 00 31 d2 e9 14 ff ff ff 90 49 89 f0 48 8b 0f 48 8b 77 08 48 89 fa b8 fe ff ff ff 48 29 ce 0f 84 8a 00 00 00 <0f> b6 01 83 f8 7f 0f 86 89 00 00 00 3d c1 00 00 00 76 72 3d df 00

So it still feels kind of related to the libstdc++ version. Any new suggestions?

BR,

Aleks

[runsiv]

Hi 

The best suggest I can provide is to downgrade libstdc++ to an older tag. The developers has identified the cause of the issue however it does not look like there will be any way to fix it in the near future which does not require downgrading libstc++ 

I would recommend trying the solution posted here, 

Regards

Runar

[Aleks]

Thanks for the quick response, would be great if you could specify which  libstdc++ version to downgrade to. This was also asked for in the solution post you provided here, but no further info there.

BR,

Aleks

[runsiv]

Hi, 

I don't have access to a Linux desktop today I can't verify this fix on my end. however I heard from a coworker that downgrading it by a tag worked from him, so https://ubuntu.pkgs.org/22.04/ubuntu-main-arm64/libstdc++6_12-20220319-1ubuntu1_arm64.deb.html this version can be worth trying

Regards

Runar