PCBnew: placing blind/buried via doesn't work using modern toolset

[Gaetano]

When using modern toolset, on a 4 layer board, trying to place a blind/buried via always produce a trough via type: this happens on both, whether using keyboard shortcuts or the right mouse click and choosing "Select layer and place blind buried via".

Modern toolset (accelerated) always manifest the issue, while Modern toolset (fallback) sometimes works correctly, sometimes do not.

Legacy toolset seems to correctly place the desired blind/buried via, still having a lot of other strange behaviors (graphic glitchs, slugghish redrawing etc etc)

Application: Pcbnew

Version: (5.1.4)-1, release build

Libraries:
    wxWidgets 3.0.4
    libcurl/7.61.1 OpenSSL/1.1.1 (WinSSL) zlib/1.2.11 brotli/1.0.6 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) nghttp2/1.34.0

Platform (as reported by Kicad Copy version info):
Windows 8 (build 9200), 64-bit edition, 64 bit, Little endian, wxMSW

Platform (real info, by me...):
Windows 10 Pro, 64-bit edition, Version 10.0.17763 build 17763

Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8)
    Boost: 1.68.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.61.1
    Compiler: GCC 8.2.0 with C++ ABI 1013

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Jeff Young (jeyjey)]

Doesn't reproduce on master (I don't currently have a 5.1.4 build...).

[Michael Kavanagh (michaelkavanagh)]

Can you upload an example board and provide detailed steps to reproduce this issue?

[Gaetano (gaetanocirillo)]

Hi,
find attached a project I created ad hoc to try to reproduce the issue: it happens, as you can see on the following short video clip

https://drive.google.com/open?id=1UsvNt39Qnm98rfo9XFQ1X8hBdigdoZgk

[Nick Østergaard (nickoe)]

I see this on the 5.1 branch as well.

Version: (5.1.4-92-g3442cc3d1), release build

[Fabien Corona (drinausaur)]

Patch proposal :
-Revised the condition to turn a blind via to a through via (if it goes through all layers)

On a side note, I am wondering why the "select layer and place through via" option ? a through-via goes through all layers, why choosing one ? Should there be a "select layer and place microvia" instead ?

[Ian McInerney (imcinerney)]

@Fabien, we have moved to GitLab now. Please turn any patches attached to these Launchpad issues into new merge requests on the GitLab repository. Also note that the fixes line has changed with the move and needs to use the new GitLab issue number (but the script has been modified accordingly).

This issue is tracked in https://gitlab.com/kicad/code/kicad/issues/1819.

[KiCad Janitor (kicad-janitor)]

KiCad bug tracker has moved to Gitlab. This report is now available here: https://gitlab.com/kicad/code/kicad/-/issues/1819