I don't know if this is hardware realted, software related, a common problem or if there are any suggestions on what to do about it.
On every Kodi box I've had, be it my own builds on top of Ubuntu minimal as suggested by Fritsch over at the Kodi forums years ago, OpenElec or now LibreElec I've always had difficulty with TV's detecting the HDMI signal from the boxes.
It seem hardware independent. It happened with AMD based systems, Nvidia based systems and with Intel based systems (though I have never tried an ARM based system, across probabyl 8 different x86 builds I've used over the years and four different TV's
Usually this happens up resume from sleep but sometimes on initial boot too.
I power on the TV, then power on the LE box. Sometimes (rarely) I get display output right away. Most of the time - however - it is a matter of pressing the power button on the LE box to put it back to sleep again and wake it again, or try turning the TV on and off again.. Sometimes this takes SEVERAL tries before it finally works, or I give up and hold down the power button on the box to force power it down and power it up again.
It's usually a running joke with my Fiance, her mother and I. Neither of them can usually get the things to display on several tries, so I get called, and try a couple of times powering things on and off again until I have display output.
When this happens, it never seems like the box is frozen. it responds to remote input to hibernate and wake up, is pingable and can be SSH:ed to. It just seems like the HDMI handshake process is having difficulties.
So I guess my question is, is this just life wit these systems, or is there something I have done wrong for several years now? Any suggestions?