Offscreen rendering shows window when built with VTK_USE_X on Ubuntu.
VTK example with offscreen rendering ON shows a quick window popup when built with VTK_USE_X. I read through the forums and other VTK issues 11911 and 11912, which show often that the problem is fixed, but I still have the issue. I looked in the code and the suggested fixes are already there. Does someone have an idea how to prevent the popup window?
I use VTK 8.1 built on Ubuntu 16.04 LTS with CMake 3.12 and libxt-dev (1:1.1.5-0ubuntu1).
cmake \ -DBUILD_EXAMPLES:bool=OFF \ -DBUILD_SHARED_LIBS:bool=OFF \ -DBUILD_TESTING:bool=OFF \ -DCMAKE_BUILD_TYPE:string="Release" \ -DCMAKE_CXX_FLAGS:string=-fPIC\ -std=c++14 \ -DCMAKE_CXX_FLAGS_RELEASE:string=-O3\ -DNDEBUG\ -fvisibility=hidden\ -fvisibility-inlines-hidden \ -DCMAKE_C_FLAGS:string=-fPIC \ -DCMAKE_C_FLAGS_RELEASE:string=-O3\ -DNDEBUG\ -fvisibility=hidden \ -DModule_vtkWebCore:bool=ON \ -DVTK_Group_Rendering:bool=ON \ -DVTK_Group_StandAlone:bool=ON \ -DVTK_USE_X:bool=ON \ ../source
I already tried the same on a recent VTK master, which posed the same problem. Should I try to use another OpenGL backend like using VTK_OPENGL_HAS_EGL?