Latest Libreelec on Intel not showing channel groups in guide

[phunkyfish]

All you see is all channels. This problem does not occur on regular kodi on Windows or Mac (which I build on).

[phunkyfish]

Had reports from several users that this seems to effect all Libreelec builds. Current hunch is that possibly an underlying XML library is behaving differently which might be different in Libreelec.

I've added some logging to #137 to help in creating a bug report for Libreelec.

@ksooo any thoughts?

[phunkyfish]

So Kodi PVR calls GetChannels, GetChannelGroups and GetChannelGroupMembers in order when the addon starts on Mac or Windows. However with Libreelec only GetChannels is called, there doesn't appear to ever be a call made to GetChannelGroups or GetChannelGroupMembers in the addon. This was confirmed by the additional logging added.

The groups are loaded correctly from XML before these call should happen. Why the calls are never made I don't know.

Working debug log from MacOSX: https://pastebin.com/JWeQwuhD
Debug log missing calls on LibreElec Intel: https://pastebin.com/LiVK2N7J

[phunkyfish]

There was a new option added at some point to PVR settings "Synchronise channel groups with backend(s)". This is enabled by default in stock kodi but not in libreelec.

Simply enabling this restores the functionality.

[MilhouseVH]

In test builds I'll revert pvrmanager.syncchannelgroups and see what effect it has, as nobody can remember why this was disabled in the first place - shitty no description/no context commits are thankfully something we've left behind.