Ubuntu 24.04: Presentation is not shown on beamer screen
January 19, 2026
We are investigating Presenter as an alternative on our Ubuntu Linux 24.04 LTS system. We have an nVidia Geforce GTX 1050 Ti graphics card with three outputs (2 HDMI and 1 DVI), and we are using them all. Our beamer uses an old resolution with 1024x768: Both possible screens for projecting are recognized.
I started Presenter from the console with the parameter '--no-sandbox', otherwise it does not run. In the logs I can see that all displays are properly recognised. The beamer screen is display 0, but presentation is not shown, when selected. On the other one (display 2) it works. Here you see the logs:
[2026-01-16 17:34:35.335] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:34:35.442] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:36:35.443] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:36:35.548] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:37:08.748] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:37:08.751] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 0,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: null,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:37:08.922] [info] LAUNCH display.html
[2026-01-16 17:38:35.549] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:38:35.653] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:40:18.704] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:40:18.705] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 0,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: 'window',
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:40:18.892] [info] LAUNCH display.html
[2026-01-16 17:40:35.654] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:40:35.759] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:42:34.400] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:42:34.401] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 0,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: 'window',
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:42:34.589] [info] LAUNCH display.html
[2026-01-16 17:42:35.781] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:42:35.908] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:43:11.604] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:43:11.605] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 0,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: 'window',
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:43:11.783] [info] LAUNCH display.html
[2026-01-16 17:44:30.341] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:44:30.342] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 2,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: 'window',
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:44:30.584] [info] LAUNCH display.html
[2026-01-16 17:44:30.598] [info] LAUNCH display.html
[2026-01-16 17:44:35.910] [info] Pusher : : ["Event sent",{"event":"pusher:ping","data":{}}]
[2026-01-16 17:44:36.017] [info] Pusher : : ["Event recd",{"event":"pusher:pong","data":{}}]
[2026-01-16 17:44:41.679] [info] DISPLAY POSITION {
displays: [
{
id: 1,
primary: true,
width: 1920,
height: 1200,
top: 0,
left: 1024,
scaleFactor: 1
},
{
id: 0,
primary: false,
width: 1024,
height: 768,
top: 0,
left: 0,
scaleFactor: 1
},
{
id: 2,
primary: false,
width: 1920,
height: 1200,
top: 0,
left: 2944,
scaleFactor: 1
}
]
}
[2026-01-16 17:44:41.679] [info] SCREENS [
{
id: 'main',
mainOutput: true,
type: 'display',
label: 'Main Audience Output',
display: 0,
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
},
{
id: 'stage',
type: 'stage',
label: 'Stage Display',
display: 'window',
showBackground: true,
showForeground: true,
showFooter: true,
foregroundTemplate: ''
}
]
[2026-01-16 17:44:41.863] [info] LAUNCH display.html
Any help would be appreciated. Thank you in advance.