pcbnew board dissaper

Martin, are there any reproducible steps that cause this? Is this board specific? It would help if you attach the board you see this on along with how you can cause it (clicking on specific footprints, a specific key combination to enter the routing mode, etc).

Also, try updating to the most recent nightly, your version seems to be slightly outdated (we are up to 5.99.0-151-g8be9aeac9).

D'oh!
Sorry. It seems to be alright.

Martin, was that comment directed at your other report, or are you unable to recreate this one anymore?

I could not reproduce the problem with the recent version (...8d43565aa5).

Great. I will mark this as invalid for now, but if you do find a way to reproduce this in the recent nightlies bump it back to new and we can re-examine it.

It still occurs, It happens occasional when I start the router and press Strg to shift vias or tracks.

@martin, and what exact version is observation from comment #7 made from?

The most recent

Application: KiCad
Version: (5.99.0-181-g772ba8e28-dirty), debug build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.52.1 OpenSSL/1.0.2s zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3
Platform: Linux 5.2.13-mt x86_64, 64 bit, Little endian, wxGTK
Build Info:
    Build date: Oct 1 2019 09:53:27
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.67.0
    OpenCASCADE Community Edition: 6.8.0
    Curl: 7.52.1
    Compiler: GCC 6.3.0 with C++ ABI 1010

Build settings:
    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
    KICAD_STDLIB_DEBUG=OFF
    KICAD_STDLIB_LIGHT_DEBUG=OFF
    KICAD_SANITIZE=OFF

What canvas is used here? Accelerated or fallback?

I use Accelerated graphics "Subpixel Antialiasing (High Quality).

What video card and driver are you using?

I use the intel graphic Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz

▶ glxinfo | grep Open
    Vendor: Intel Open Source Technology Center (0x8086)
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Kabylake GT2
OpenGL core profile version string: 4.5 (Core Profile) Mesa 13.0.6
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 13.0.6
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 13.0.6
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:

This sounds like a Mesa-specific issue. Can you enable the Intel-specific graphics driver instead? Depending on your desktop, this can be set in System Settings->Defaults

As far as I know, the mesa driver is directly supported by intel.

If you cannot use a separate driver, you may need to request support from the Mesa forum. Sometimes they have driver switches that can help in cases like this. Let us know if you get an answer and we can update our driver-specific notes.

KiCad bug tracker has moved to Gitlab. This report is now available here: https://gitlab.com/kicad/code/kicad/-/issues/2562