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, 

I have asked the developers regarding question 1

Regarding question 2. Do you have https://github.com/NordicSemiconductor/nrf-udev installed?

Regards

Runar

[gorazd]

hi,

number 2 i found the solution on forum (port flag should be explicitly given, snr is not enough):

nrfutil dfu ble -pkg dfu_edh_0.11.4_for_testing_purpose.zip -ic NRF52 -n DfuMTK -p /dev/ttyACM0 -f

Problem 1 still persists.

[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

[fanoush]

what worked for me without downgrading libstdc++ was to run it from terminal with preloading system libstdc++ version via  LD_PRELOAD like this

LD_PRELOAD=/lib/x86_64-linux-gnu/libstdc++.so.6 ~/opt/nrfconnect-bluetooth-low-energy/nrfconnect-bluetooth-low-energy-4.0.4-x86_64.AppImage

my guess is that the AppImage contains older version of libstdc++ and having both in memory may cause this so by preloading system version there is only one loaded

[Mattias]

I'm also using Ubuntu 22.04 and have the same white screen problem. When I downgraded libstdc++ to 6.0.28 I couldn't boot my laptop anymore. I managed to fix that by reinstalling the original version in recovery mode. In case you don't want to spend some hours on recovery I don't recommend downgrading libstdc++. My white screen problem remains so if anyone has another advice it would be appreciated.

[fanoush]

then maybe try my suggestion above your post, it worked for few people

[Mattias]

Thanks, but I already tried that. I should of course have mentioned that.