The orientation sensor causes a crash when disabling and afterwards enabling
again the first output in a multi-monitor environment. This is difficult to
debug, since gdb does not provide good information and with valgrind it does
not crash indicating that it is a race. But output of gdb and valgrind together
shows that the orientation sensor is responsible.
For now disable the orientation sensor. Reasons are:
- Output enablement is a basic feature and must work first flawlessly before thinking about advanced features.
- The orientation sensor did never really work flawlessly according to user feedback.
- The orientation sensor hooks into Screens class which will go away. A rewrite of the sensor is necessary.