Have a look into these:
- On Z3 Compact, Android 6.0.1, when you select Qualcomm driver and turn on or off "disable fflux", screen become black, without any possibility to change it (only an hard reebot worked) .
- With Compositor driver, when I install an app, fflux disable for a moment, but is ok. The problem is with Qualcomm driver, because it disable fflux permanently.
- With Compositor driver, if I enable Darkroom, it works for a few seconds, and then it changes to a strong red mode (but is not Darkroom).
Darkroom only work with Qualcomm, but Qualcomm has bugs mentioned.