XG1v4 no longer auto-detecting TV resolution after possible OTA update

My XG1v4 recently got a new firmware update (diffrent from the constant X1 software updates).  I believe the firmware update was to version 4.0 for the equipment.

Check on the settings menu and 'about' to see if you're running v4 ... if so it may be a bug in the new firmware

will take a look at that menu. Thanks for the info. Not sure there is a way to flash back to an older version of firmware though if this is it

If it is due to the 4.0 firmware update, there's nothning you can do as that's controlled by the Comcast folks.  As you noticed, the X1 boxes reboot overnight to check for and pickup any software or firmware updates.  You could be picking up a new X1 box that is on firmware 3.9 or earlier, and then once it reboots within 24 hours it'll be updated to a newer version.

I'm not seeing any major issues, but I did notice that my Sony tv blinks 'white' on the screen for a second when I 1st turn it on in the morning after a reboot.  This looks to have something to do with the HDMI handshake after the box is unplugged or rebooted and only started with the 4.0 update.  I also noticed that the 'about' info screen on the settings menu only takes up the upper left corner of my screen instead of full-screen like it used to ... that's recent as well and possibly related to the update.

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@fr4nk15 wrote:

Hi all, 

 

Looking for some inputs as to next steps here.  I have a XG1v4 box, Denon AV receiever which handles switching, and an LG 55" OLED B7A.  Wiring is Box -> Denon via HDMI, Denon to TV via HDMI over an ARC port.  

 

Up until last week, all of these items were playing well together. Some point last week, the box received an OTA update. Since that update, every time we turn the tv on, it defaults to 4:3 480p resolution as opposed to 16:9 4k.  Prior to that, there were no issues.  After several days of manually modifying the resolution, the box eventually went black screen only despite reset and power down, as well as attempts to interact with it remotely by comcast.  So I took that box back and got a new XG1v4.

 

Plugged in the second box.  Worked correctly for about 8 hours, power down and restart maintained the appropriate resolution.  After about 8 hours however, it began to again exhibit the same behavior, where it maintained appropriate resolution if left on, but when turning the power off and on again, would restart in 4:3, requiring manual resolution resetting.    Took that box back, acquired a THIRD XG1v4.  

 

With the third XG1v4 I saw the exact same behavior, only this time I witnessed a reboot.   Approximatley 6 hours after having the new box setup, working well with detecting the resolution, powering it down and back on again with it maintaining 16:9 4k, it rebooted itself, came back online, and was again only in 4:3 mode, requiring manual setitng to 16:9.  As with the other boxes, it works fine in 16:9 until you turn it off, and then when turning it back on it reverts to 4:3, requiring manual reset.  

 

Is anyone else experiencing this behavior? The repeated behavior of the box working for several hours and then rebooting and functioning in this manner really makes me wonder if an update is being pushed that is inadvertantly causing this behavior?   Thoughts?

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ARC is 'out from TV' to the receiver. connect the set top box to hdmi 1 on the TV. then connect the ARC port out of the TV to the ARC in port on the receiver. the ARC is audio is returned to the receiver from the TV.