Forum Discussion

Christoph Puetz's avatar
Christoph Puetz
Copper Contributor
Aug 25, 2017

Skype for Rooms not presenting to TV after system sleep

We have one of those LogiTech Skype for Rooms systems with the Surface Pro / Docking station. Ever since the upgrade from v2 to v3 of SRS the system fails to present meeting content to the TV.    A...
Skype for Business
Christophe Palaniyandy's avatar
Christophe Palaniyandy
Copper Contributor
Sep 21, 2018

would this device wake up a sleeping TV if upon SRS video output ?

Pavel Aivazov's avatar
Pavel Aivazov
Iron Contributor
Sep 21, 2018

yes

I have a plenty of Smartdocks and Lenovo Hub 500 and they all work fine if a TV supports CEC.

 

  • Pete Ashof's avatar
    Pete Ashof
    Copper Contributor
    Apr 30, 2019

    For those that bought screens that support HDMI-CEC and have a Logitech Smartdock (or probably any other SRS system, but not 100% sure). There is a solution in the form of a box that converts HDMI-signal sleep/resume to HDMI-CEC. I have tested the HD CTL 100 and that one works.

  • Pete Ashof's avatar
    Pete Ashof
    Copper Contributor
    Apr 09, 2019

    Hi Pavel Aivazov ,

     

    It is a little bit difficult to find a screen that works correctly with the SmartDock.

    I thought that the signalling that turned the screen on was DDC/CI because a screen I have did wake up and it had DDC/CI support. but if I disable DDC/CI on this screen (Dell E5515Hc) the screen still wakes up when the Smartdock wakes up. So it's also not DDC/CI that is used.

     

  • Pavel Aivazov's avatar
    Pavel Aivazov
    Iron Contributor
    Apr 05, 2019

    Hey Pete Ashof

    you are right, that was my misunderstanding of CEC :) And yes, we use screens which are smart enough to go to sleep when there is no HDMI signal and wake up when incoming signal is detected. For instance, Samsung DC49J and QE82N 

  • Pete Ashof's avatar
    Pete Ashof
    Copper Contributor
    Apr 05, 2019

    Pavel Aivazov Hi Pavel,

     

    Are you sure you are using CEC?

    According to Logitech they don't:

    Does Flex support CEC for attached displays?

    Logitech Flex as well as SmartDock with Microsoft Surface Pro does not support CEC. It is recommended to use commercial displays with power management capabilities such as schedule on/off times.
    (from support.logitech.com/en_us/product/smartdock-flex/faq#link_Does-Flex-support-CEC-for-attached-display).
    Maybe you are using screens that indeed just "sleep" where with HDMI-CEC it would really go in and out of standby?
    I have a Samsung screen (55NU7470) that supports AnyNet/HDMI-CEC, it is enabled, but I can't get it to work properly with a Smartdock, I always end up with a screen that doesn't switch on anymore once it switches off (and I also can't prevent it to switch off).
    May I ask what screens you use at the moment that work well with the Smartdock/SRS?
  • JonasBack's avatar
    JonasBack
    Steel Contributor
    Sep 21, 2018

    Sounds promising. Yeah I know. I actually have two very new LG TVs at home, one smaller 32" and one larger 49". Both are "premium" smart TVs and should support HDMI-CEC. I have Apple TVs hooked up to both where one works perfectly (as soon as I wake upp the Apple TV it turns on) but the other one does not work

     

    LG's response when opening up a case "We only support LG devices supporting Simplink". ARGH.

  • Pavel Aivazov's avatar
    Pavel Aivazov
    Iron Contributor
    Sep 21, 2018

    No one in the room for some time - SRS screen will be dimmed, TVs will go to sleep mode

    Someone enters the room - SRS will turn on its screen immediately, TVs will wake up in 1-2 seconds.

    IMPORTANT: TV must support CEC, even relatively new TV may not support it, test it!

  • JonasBack's avatar
    JonasBack
    Steel Contributor
    Sep 21, 2018

    Great info! How does it practically work. When you press "Join" on a meeting it fires up the TV? Or does it fire up as soon as someone walks into the room?