Extensions not showing anything

Support
1

Using Ubuntu 22.04 and Slicer 4.11.20210226. Also tried on the preview release.

Loading Extensions Manager shows 100% at bottom but nothing appears. I am just using this on a home computer with no firewalls etc. My internet connection otherwise works fine.

Desperately trying to install the VMTK.

Any help appreciated.

Kind regards,

Jeremy.

LOG:
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Session start time …: 2022-05-14 09:33:30
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Slicer version …: 4.11.20210226 (revision 29738 / 7a593c8) linux-amd64 - installed release
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Operating system …: Linux / 5.15.0-27-generic / #28-Ubuntu SMP Thu Apr 14 04:55:28 UTC 2022 / UTF-8 - 64-bit
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Memory …: 15788 MB physical, 2047 MB virtual
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - CPU …: GenuineIntel 12th Gen Intel(R) Core™ i5-12600K, 10 cores, 16 logical processors
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - VTK configuration …: OpenGL2 rendering, Sequential threading
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Qt configuration …: version 5.15.1, with SSL, requested OpenGL 3.2 (core profile)
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Developer mode enabled …: no
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Prefer executable CLI …: yes
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Application path …: /home/jeremy/.var/app/Slicer/bin
[DEBUG][Qt] 14.05.2022 09:33:30 [] (unknown:0) - Additional module paths …: (none)
[DEBUG][Python] 14.05.2022 09:33:31 [Python] (/home/jeremy/.var/app/Slicer/lib/Python/lib/python3.6/site-packages/pydicom/datadict.py:432) - Reversing DICOM dictionary so can look up tag from a keyword…
[DEBUG][Python] 14.05.2022 09:33:33 [Python] (/home/jeremy/.var/app/Slicer/lib/Slicer-4.11/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: Annotations
[DEBUG][Python] 14.05.2022 09:33:33 [Python] (/home/jeremy/.var/app/Slicer/lib/Slicer-4.11/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentEditor
[DEBUG][Python] 14.05.2022 09:33:33 [Python] (/home/jeremy/.var/app/Slicer/lib/Slicer-4.11/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentStatistics
[DEBUG][Qt] 14.05.2022 09:33:33 [] (unknown:0) - Switch to module: “Welcome”
[WARNING][Qt] 14.05.2022 09:33:34 [] (unknown:0) - An OpenGL Core Profile was requested, but it is not supported on the current platform. Falling back to a non-Core profile. Note that this might cause rendering issues.
[WARNING][Qt] 14.05.2022 09:33:39 [] (unknown:0) - QXcbConnection: XCB error: 3 (BadWindow), sequence: 2096, resource id: 13383320, major code: 40 (TranslateCoords), minor code: 0
[WARNING][Qt] 14.05.2022 09:34:28 [] (unknown:0) - QXcbConnection: XCB error: 3 (BadWindow), sequence: 4651, resource id: 13387921, major code: 40 (TranslateCoords), minor code: 0

2

Check out these troubleshooting instructions and let us know if they help:

https://slicer.readthedocs.io/en/latest/user_guide/extensions_manager.html#extensions-manager-does-not-show-any-extensions

1 Like
3

Hi,

I am having a similar issue. The Extension list only reports “All (0)”. This happens both via Slicer and by manually visiting the URL @KitwareMedical/slicer-extensions-webapp

EDIT: Slicer version 4.11.0-2020-06-12 r29143 / 95c7682
I am using Ubuntu, my kernel is recent (5.13), the file ‘/proc/sys/kernel/unprivileged_userns_clone’ contains 1 and --no-sandbox has no effect, as well as QTWEBENGINE_DISABLE_SANDBOX=1 ./Slicer.

Any hint? :slight_smile:

4

The Midas backend of the older Slicer versions has been replaced by a new one, and so extensions for those versions are not available.

You’ll need to use a more recent Slicer. 5.0 will be released imminently, and the 5.1 preview version is virtually identical to the coming stable.

1 Like
5

I am using Ubuntu 22.04 and was having the same issue.
This is the step that worked for me, using this flag before launching Slicer: QTWEBENGINE_DISABLE_SANDBOX=1.

Thanks for pointing me in the right direction.

1 Like
6

Where should I put QTWEBENGINE_DISABLE_SANDBOX=1 ?

7

in the terminal window, before you start Slicer. So this will be shell command like
export QTWEBENGINE_DISABLE_SANDBOX=1
then you can invoke
./Slicer
and extension manager should be available to you.

8

This issue was recently addressed (BUG: Fix blank Extensions manager for Linux package due to Chromium sandboxing by jcfr · Pull Request #6744 · Slicer/Slicer · GitHub). In the current preview release there is no need to set this variable.

1 Like