Is it possible to update to v9.2 and go back to v9.02 via the LibreElec update dialog?
I did a downgrade from LE 9.1.x to 9.0.2 once by using the GUI. No problems. Should work with 9.2, too.
Code
2019-12-03 18:48:34.848 T:140645189416704 DEBUG: CAESinkALSA - HDMI device "hdmi:CARD=NVidia,DEV=0" may be unconnected (no ELD data)
2019-12-03 18:48:34.875 T:140645189416704 DEBUG: CAESinkALSA - HDMI device "hdmi:CARD=NVidia,DEV=2" may be unconnected (no ELD data)
2019-12-03 18:48:34.888 T:140645189416704 DEBUG: CAESinkALSA - HDMI device "hdmi:CARD=NVidia,DEV=3" may be unconnected (no ELD data)
Does it crash when you have no HDMI devices connected?