There was another thread I found when I was experiencing the problem of having the XG1v4 UHD box failing to provide anything other than a black signal and no sound when waking up from sleep.
Turns out that by turning off the deep color setting on my TV, it now works fine.
However, I believe that this STB should be supporting 10 and 12 bit color profiles so that my other devices that are connected via my AV Receiver (which includes the XG1v4) can deliver the full range of color profiles to my LG tv.
My set up:
Shield TV---- Yamaha A780 ---- HDMI 4k ARC ---- LG C8P
On this TV, the setting in question is Settings->Picture->HDMI ULTRA HD Deep Color
Hopefully Comcast is working on support for this.
insanity_check, thank you for letting us know! I'll be sure to submit your feedback regarding UHD Deep Color. Thank you for taking the time to reach out!
I understand where you're coming from! I'll keep the thread open and let you know as soon as there's an update.
Any word on this fix? As of today, turning UHD deep color on that HDMI input so that other boxes like FireTV 4k work totally crashes out the Comcast box still requiring a complete power cycle.
Trouble is, as soon as you use a device with Deep color support like FireTV 4k, the TV mandatorily switches the input to Deep Color support. So unless you remember to go and turn it off before you shut it down, the next time you startup your rig with the Comcast box input selected, it requires yet another restart....super drag.