HDMI Signal strength

[bennettjp]

Hello all,

Recently my office picked up several Rock64 boards to be used for a network monitoring wall project. We have two network walls, the first consists of 3 50" televisions and the second consists of 4 55" televisions. I noticed that when using very long HDMI cables, in our case 50 ft, the hdmi signal is too weak and the TV displays no signal.

Is there a config_hdmi_boost value that I can modify like on the Raspberry Pi? 

I know that the best case scenario is to mount the board to the back of the television and use a short cable. Our network wall already had four 50 ft and three 25 ft HDMI cables run in the ceiling of our office.

Thanks,

[Luke]

Possibly in extlinux. I'll check and get back to you.

[bennettjp]

Thank you. I forgot to mention we are using the following:

Debian 9.5 Stretch with MATE Desktop 1.16.2

[Luke]

Thank you. I forgot to mention we are using the following:

Debian 9.5 Stretch with MATE Desktop 1.16.2

Which image exactly? Could you try 0.7.9 LXDE Ubuntu (Bionic) just for the sake of testing? thanks.
I haven't yet determined how to 'boost' HDMI strength in extlinux