I also have the same problem:
black screen after reboot into 4.13.26.46
video driver: nvidia 387.26 (from CUDA ppa)
Restarting with 4.10 solves the problem
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** Attachment added: "pyqttest.py"
https://bugs.launchpad.net/ubuntu/+source/vtk6/+bug/1722197/+attachment/4965657/+files/pyqttest.py
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Title:
Public bug reported:
It is impossible to use VTK and PyQt together as of Ubuntu 17.04.
python-vtk6 includes bindings for Qt4, even if they are deprecated. Qt5
bindings should be included instead (Debian already switched, according
to their source repository).
Since the Qt4 bindings are deprecate
