[Vimes]

@Vimes going back through the available builds would be the normal way to identify the first build with this unwanted behaviour... slow/tedious but usually effective.

I have found that build 314 works fine but from build 315 on it fails.

Build 315....

http://forum.kodi.tv/showthread.php?tid=...pid2549210

possibly relevant bit....

libcec:
added: log a warning when we detect that RPi's CEC service is used by something else, blocking libCEC. issue #191 (5469da23)
changed: const IAdapterCommunication::GetLogicalAddresses(), making the mutex mutable for now without changing the platform lib. closes #259 (0cf3f0fe)
fixed: cross compile includes (50f1179d)
fixed: detect debian based distros properly when installing python. closes #314 (f4e2ed77)
fixed: don't filter out broadcast in HandleDeviceVendorCommandWithId(). issue #309 (e1df683b)
fixed: send an active source message when a routing change has been received with libCEC's address as new route and no active source message has been sent yet. issue #309 #205 #233 (67d444dd)
fixed Commit:67d444d (d1a708b9)
fixed: vs2015 c++ redistributables (8563411d)

I have checked this twice by going up and down the builds and it is consistent with build 315 being the first to fail to switch the TV to the Pi3.

As noted at the beginning of this, the TV will switch on but the CEC config will not switch "source to this device on startup"



Hopefully that might be useful

EDIT: Just to add. This was a vanilla install. No addons, apart from the one to look for and install these DEV releases. No TV shows or Movies added. Apart from regional changes nothing else done.