ThirdScreen Plugin for Platform Video Marquees, 3+ Screen Support, and more

[Fukamushi San]

Somehow the plugin does not register the displayed game in screensaver mode. Is there a fix for this? As soon as screensaver mode start, it will still show the last game I manually selected. I am currently using the VisioN theme.

[AstroSonic65]

Third Screen troubleshooting — BigBox appears on secondary LCD after exiting a game; platform/game marquee behavior

Hello superrob3000,

First, thank you for developing and maintaining the Third Screen plugin. I'm looking for some help troubleshooting my setup and confirming the correct configuration for platform-category artwork, game marquees, and display handling.

System configuration

• LaunchBox: Version 13.27

• Third Screen: Version 6.0.4

• Arcade emulator: GroovyMAME 0.289

• Graphics card: AMD Radeon HD 5450 using CRT Emudriver (legacy driver)

• Primary display: Sharp Image Arcade CRT connected to a Dell PC

• Secondary display: 24" Ultrawide LCD for displaying platform and game marquees 

• Video configuration: GroovyMAME uses SwitchRes and super resolutions, with super_width set to 2560 in mame.ini.

• CRT configuration: Custom monitor settings are configured in GroovyMAME for the CRT.

• Third Screen profile: Arcade Cabinet Marquee

• BigBox Marquee Screen: Set to None, following the Third Screen documentation.

• BigBox Mirror Displays: Off.

The CRT is working correctly, and games launch and display properly on it.

Current behavior

The plugin successfully displays the correct game's marquee on the secondary LCD while a game is running on the CRT.

However, I have observed the following:

• When launching a game, the marquee briefly disappears and then reappears.

• When exiting the game, the secondary LCD switches to displaying the BigBox interface, including the platform categories or game lists, rather than the selected platform or game's marquee artwork.

• BigBox remains fully functional on the secondary LCD. I can navigate platform categories and game lists there, and games still launch and play correctly on the CRT.

I initially wondered whether this was related to the monitor configuration, but the CRT output itself appears correct.

Troubleshooting already performed

• Created a new Third Screen profile named Arcade Cabinet Marquee.

• Confirmed that the profile is detected and the marquee image is found in the Third Screen log.

• Confirmed that Windows reports both displays during the Gyruss test.

• Reviewed the relevant display settings in mame.ini, including numscreens 1, screen and screen0 targeting \\.\DISPLAY2, switchres 1, changeres 1, and super_width 2560.

• Left BigBox's Marquee Screen set to None, as recommended in the Third Screen documentation.

• Reviewed the display transitions in the Third Screen log. During game launch, the primary display's reported resolution changes from 640×480 to 2560×256 and then returns to 640×480 after the game exits. Both displays remained detected in this test.

• Have not changed the CRT or GroovyMAME resolution settings because games are displaying correctly.

Attached please find find the Third Screen log and LaunchBox/BigBox debug logs from a fresh reproduction, along with screenshots of my current Third Screen profile settings.

Thank you for any guidance you can offer.

Kent 

 

 

Debug 2026-10-17 12-04-39 AM.log ThirdScreenLog.txt