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I’m using the latest Fire TV Cube. When I listen to music, every few minutes the AV receiver turns off the input because it thinks the device is inactive. This happens because the video output is static. Has anyone experienced a similar issue and managed to fix it within the Plex app?
I have reported this multiple times with no resolution. Latest is below… They don’t care and I think it is time to move to Jellyfin and quit giving them money. Don’t care about adding all the live stuff. Want the core functions to work.
Thank you for your response. It’s good to know that Support simply does not respond. I started my journey with Plex and purchased it; fortunately, I have a 14-day trial period and can still cancel.
If Support has not responded for such a long time, it is obvious to me that I will resign from using this application.
You are right — it would be enough to add something animated, even something like what appears below the currently playing tracks — those jumping audio bars. That alone would be sufficient.
Thank you very much for your comment; it helped me a lot and now I know that I need to consider other applications.
For my Fire TV 4K Max sticks, there is a setting in Settings > Display & Audio > Display > Sleep Mode Behaviour.
The default is No signal which will shut down the HDMI signal in sleep mode. There is also Black Screen which will send a black screen during sleep mode. This mode lets you listen to music when the screen is turned off (sleep mode).
I don’t know if the cube has this setting, but it’s worth looking for it.
Hi. Thank you for your reply. I had tried this setting earlier, but I gave up on it because after making the change, the information from my Yamaha RX-V6A receiver was no longer displayed on the screen. This time I spent more time on it and changed what you suggested, and I also set ALM to permanently on (not auto). Now the on-screen information from the Yamaha receiver is displayed, and I’m testing music playback. So far, this is already the third track and it’s been working the whole time :o)
I have to say that issues with on-screen informations are because it is using all the time Dolby Vision in my case and I don’t want to turn it off.
I hope it continues to work this way — thank you very much for your help.
… now the fourth song is playing 
That setting is in the cube, but not on the FireTV or Firestick 4K that I have… Still would love them to just send some kind of screen keep alive on the Plex side so it would work on those. Doesn’t seem like that big of an ask…
Yes, you are right - like a small bars which you can find on a list below player.
In my case music stopped again after around 1 hour on Cube.
I just checked. Despite switching to Black Screen after 1 hour, the music stops and there is silence. When I go back to Plex, a message flashes in the top right corner inside a red frame with a red exclamation mark: “An error occurred while playing this item.” (In my case, it appears in Polish.)
So even the “black screen” option does not help.
This doesn’t have anything to do with the black screen. It’s just an issue with the Plex app itself. I’ve had it happen as well and after rebooting the device I’m able to play the tracks it was erroring out on before. There’s been a few threads in the past posted for that error.
Does your Cube support Amazon Ambient Experience? I assume it does if it’s the current gen. If you have Ambient Experience running it will allow audio to play through, so I just have my Fire Stick set to run Ambient Experience for a long period when idle before it goes into normal sleep mode, so I can pay music without having to interact with the remote to keep the device on.
I will write you step by step what I did and now I’m testing it. 20 minutes of watching and it works so far
Fire TV Cube 3rd Gen – Fix for Music Stopping / Black Screen (Full macOS Guide)
This guide explains how to stop Fire TV Cube (3rd gen, Fire OS 7.7.1.1) from killing music playback when the screen goes black or screensaver activates.
This fix disables aggressive power management using ADB.
Tested on:
Fire TV Cube 3rd Gen
Fire OS 7.7.1.1
macOS (Apple Silicon / Intel)
On your Fire TV Cube:
Go to:
Settings → My Fire TV → Developer Options
Enable:
ADB Debugging
That’s all for the Fire TV side.
If you already have Homebrew installed, skip to Part 3.
Open Terminal on your Mac.
Paste this command exactly:
/bin/bash -c “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)”
Follow the instructions shown in Terminal.
After installation finishes, add Homebrew to your PATH.
If you are using Apple Silicon (M1/M2/M3), run:
echo ‘eval “$(/opt/homebrew/bin/brew shellenv)”’ >> ~/.zprofile
eval “$(/opt/homebrew/bin/brew shellenv)”
If you are using Intel Mac, Homebrew usually installs automatically into PATH.
Now verify Homebrew works:
brew –version
You should see a version number.
In Terminal, run:
brew install android-platform-tools
Wait for installation to complete.
Verify ADB works:
adb version
You should see something like:
Android Debug Bridge version x.x.x
First find your Fire TV IP address:
Settings → My Fire TV → About → Network
Now in Terminal run:
adb connect YOUR_FIRE_TV_IP
Example:
adb connect 192.168.1.10
The first time you connect, your TV will show an authorization prompt.
Select “Allow”.
You should see:
connected to 192.168.1.10:5555
Run these commands:
adb shell settings get global stay_on_while_plugged_in
adb shell settings get system screen_off_timeout
Typical default output:
0
900000
900000 milliseconds = 15 minutes.
That means the device turns off the screen after 15 minutes.
Now run:
adb shell settings put global stay_on_while_plugged_in 3
adb shell settings put system screen_off_timeout 2147483647
What this does:
stay_on_while_plugged_in = 3
Keeps device active while plugged in (Cube is always plugged in).
screen_off_timeout = 2147483647
Sets timeout to maximum possible value (about 24 days).
Run again:
adb shell settings get global stay_on_while_plugged_in
adb shell settings get system screen_off_timeout
You should now see:
3
2147483647
Reboot the Fire TV:
adb reboot
After it restarts, reconnect:
adb connect YOUR_FIRE_TV_IP
Then check again:
adb shell settings get global stay_on_while_plugged_in
adb shell settings get system screen_off_timeout
If the values remain:
3
2147483647
Then the fix persists after reboot.
Prevents the screen from turning off automatically
Prevents aggressive idle power state
Stops black screen from killing audio
Allows Plex and other music apps to play full albums
Keeps album art visible continuously
The screen will now stay on indefinitely unless manually turned off.
Future Fire OS updates may reset these values.
This does not root the device.
This does not modify firmware.
On Fire TV Cube 3rd gen (Fire OS 7.7.1.1), this fix successfully:
Prevented black screen
Prevented audio from stopping
Allowed uninterrupted music playback
Now it works for 30 minutes and the screen is all the time on!
So far I see all the time screen with informations about singer
I can confirm that it now works flawlessly. The screen with the currently playing track stays visible the entire time, and everything works as it should.
It’s been running for about two hours now, or almost two hours.
Sorry that your sticks don’t have the setting. I should have mentioned that my sticks are 2nd Gen.
I don’t disagree. It should be easy enough for Plex to swap the poster and text from side to side every minute or so, that would probably be enough to keep things alive I imagine.
Thanks for the Ambient Experience tip. I found that my music would sometimes stop after about 30mins or so, until I turned on Ambient Experience in the Fire TV Settings > Display & Audio > Ambient Experience.
In Ambient Preferences > Advanced Settings, I set it to Never, it was set to 30 mins.
So far I have been able to play music for an hour + without interruption.
The only downside is, you have to return to Plex after Ambient Experience activates to stop the music from playing, but I can live with that … lol
