vdr 2.4.0 + dvbapi, works on x86, it doesn't work in libreelec (amlogic)

As I said, I doubt it's a heat problem (after all android is able to tune no matter what), but it's been reported in a spanish telegram group that this box tends to overheat (let's be frank, like 99% of tv boxes ) and, apart from the usual suggestion to change the heatsink and/or add a fan, they say to just put the box upside-down and that's what I'm trying. Crossing fingers....