[Exnor]

From my personal experience:

LG 2009 models LH3xxx tv sets (SimpLink 1.x):

With or without Simplink activated no problems where found. CEC commands works as expected.

LG 2011 models LV5xxx, LV4xxx (LG Smart TV's running Linux kernel 2.6.x and SimpLink v2(?)):

Without any other CEC enabled device connected to the tv, rPi CEC works as expected (SimpLink On or Off),
With SimpLink On and a LG Blu-ray player connected to the tv, CEC only works on the rPi and the tv randomly selects the HDMI input of the rPi as source preventing the normal usage of other inputs... So CEC on the rPi must be turned off.
With SimpLink off CEC does not work on any device

LG 2014/2015 WebOs TV's models LB(8,7,6,5)xxx (WebOs 1.x):

Prior to firmware version 4.45.x SimpLink causes the OS to become slow and unusable with several CEC devices, rPi inc!uded. Turning off SimpLink resolves this and CEC works as expected on all devices including rPi.
After firmware 4.45.x this problem appears to resolved and so far SimpLink ON is working with rPi and other devices connected to the tv.


Will update this info when i can test otherf models.