You don’t receive hdr signal, because your tv is sdr. That’s backward compatibility. But with hdr capable screen connected, Coreelec always delivers hdr signal if played material is hdr.
No matter what I set. If hdr screen detected, there’s no any conversion to sdr performed.
On MiBox if I set the same option in AndroidTV settings (tone hdr to sdr) it works always - even if hdr screen is connected.
Can we consider it as CE bug? I think when “Tone hdr to sdr” option is set to Active, hdr should be completly disabled, even on hdr tv, auto should perform conversion only when sdr tv detected (it works this way now), disabled should never perform any conversion and hdr should be delivered even on sdr tv.
From my test, curtently it works always in “auto” mode, enabled and disabled option both have no effect.