Ubuntu (kde/4k)

[Brian Cluff]

On 06/18/2016 09:22 PM, Michael Butash wrote:
> Since I don't know anyone else doing a 4k too - are you using a native
> hdmi 2.0 gpu port?

Yes, I'm running a Nvidia 980ti on mine.

> I'm using an old AMD/ATI 7950 with displayport outs I'm connecting to 3x
> club3d dp1.2-to-hdmi2.0 adapters to my tv's that work mostly ok, but one
> always seems to freak out

I've had a decent amount of weird behavior as well, all of which seems 
to come from substandard or too long of cables.  Once I used a high 
quality cable that was much shorter my setup has been rock stable.

> ...and stop reporting the edid's properly after powering them all
> off and on at night.  Not sure if this is the gpu card port or the
> adapter really, so starting to suspect those as maybe wonky, but curious
> if native hdmi is any more capable for power management or on/off
> behavior.  Wondering your mileage here what works for you.

 From what I have found it's all down to the loss of edid when the TV 
goes off where computer monitors will continue to report that they are 
connected even while off.
I've recently purchased a higher end HDMI splitter that will supposedly 
cache edid information.  I've yet to hook it up to find out of it will 
work in reality.  If it does, it will completely fix the problem.

Brian Cluff