Clickshare Conference - Samsung Anynet+ CEC protocol on some models can trigger a startup loop. (QB and QE series)

Issue

We have noticed that the Samsung Anynet+ CEC communication from some Samsung models is waking the ClickShare Conference devices (CX20/CX30) up again when they go to ECO-standby mode. This causes the screen to turn ON again and display the wallpaper until it returns to ECO-standby and it loops in this ON/OFF event.

Solution

Some important settings in the Samsung screen to check!
(Settings location might very depending on the screen model or firmware version)

Different sleep states of the Samsung

When no signal is displayed, the backlight of the screen is turned off but the LED of the screen is blinking red. After a certain time in above standby state (can be several hours), the screen will go to power off state by itself. This is the same state as you would turn off the screen with the remote control. LED of the screen is stable red in this state.

For optimal compatibility between the devices, it is advised to configure the Power and Energy Saving settings in the following way.

System -> Power and Energy Saving -> No Signal Power Off = Off
System -> Power and Energy Saving -> Auto Power Off = Off
(In some screens this is also called Eco Solution)

Different connectivity types and the influence of CEC

1. The ClickShare device is directly connected to the Samsung display, in general here CEC anynet+ can be activated and should cause no issues.
2. There is an indirect connection towards the Samsung display that changes to the EDID setting in the HDMI™™ connection. For example, with an extron HC404 what has a default EDID 1080P 60HZ. In this case the CEC needs to be disabled between the ClickShare and the Samsung screen on both sides.

System -> General -> Anynet+ (HDMI™-CEC)
System -> General -> Hot plug

Different HDMI™ EDID standards in some Samsung displays

Some Samsung display is factory set to the HDMI™ EDID version 1.2 where the ClickShare supports the HDMI™ 1.4b standard. This is causing some compatibility issue related to EDID behavior. ClickShare supports max resolutions until 3840x2160@30Hz where some screens always boot in 3840x2160@60Hz causing a boot failure. You can test what EDID a TV is set to using an EDID tool if required.
To enter the factory menu.

• Select the HDMI™ input.
• Turn the tv OFF with the remote control.
• Press in corresponding order “Mute 1 8 2 ON” to open the factory menu.
• Select Control -> EDID and set EDID to ON and enter, this will read out the current settings.
• Use return to go back in the menu.
• Select EDID and set HDMI™ EDID Ver to 1.4 if set differently and enter.
• Select EDID Write ALL, highlight success and press the arrow key to start and write the EDID again until success appears.
• Set the TV to Standby