"BubbaNag" wrote:"BubbaNag" wrote:
I have a Roku 3, 4200X and the December 16, 2017 update "broke" 1080p playback for me too ... the video flickers and flashes while the audio cuts in and out on one of my three Panasonic plasmas. Forcing 720p restores stable audio and video. The updated Roku fails on my 2011 TC-P65VT30 but works fine on both my 2009 TC-P42G15 and my 2012 TC-P50ST50.
I have been getting diagnostic and troubleshooting help from Roku Support. They have been responsive but have failed to resolve or replicate this issue. Please, if you're experiencing this, reach out and give them your details...they clearly need more cases to identify the issue.
Here are all the troubleshooting things they had me try: Restart. Power off (disconnect plug for 60 seconds) and restart. Reseat HDMI cable. Change HDMI cable. Change HDMI port. Delete an affected channel and restart. Delete lots of channels and restart. (I deleted one and then 21 leaving 6 restarting in between the 1 and 21. Both of these despite seeing the flickering on the Roku home page and menus.) Set the theme to default and restart.
Nothing has worked. Hope enough of us will contact them so they can identify the issue and get a fix in the queue!
Happy (low resolution) Holidays!
The December 12, 2018 update has changed the behavior of the Auto/1080p selection on my Roku 3, 4200X which is connected to my 2011 TC-P65VT30: Instead of flickering, the TV display is simply black. No image shows at all. I can still only watch 720p output. Sigh.
In Settings>System>Advanced system settings>Advanced display settings, go to 'Auto-adjust display refresh rate' and make sure this is 'Disabled'. This can cause the behavior you described in some circumstances, and should not typically be enabled for most use-cases.
If the issue persists, or the setting is already disabled, I'd also recommend swapping out your HDMI cable and/or HDMI port in use on the TV to see if this helps clear up the issue.
Feel free to PM me with more details if you need more help from there!
Any HDMI cable that is denoted as 'premium' or 'high-speed' and is confirmed to be HDCP 2.2 compliant would be a good choice. This required for 4K content support.
Definitely double check the setting I mentioned earlier, as this can cause the behavior you described.
Feel free to PM me with more specifics, including the channel(s) you observed the issue on, content examples, TV make/model and your Roku account email address if you need additional help from there.