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I installed newest cinnamon 24.04, and while in previous version everything worked just fine, in this version I have a 'ghost monitor', to which the cursor can wander, but which cannot be turned off in Display settings.

If I open nvidia settings, I see this:

dialog with two display options, of which the selected one is PRIME 1920x1080

So there is some prime display, which cannot be controlled. I tried a recommendation to add a kernel parameter

initcall_blacklist=simpledrm_platform_driver_init

but this just makes the OS unbootable.

I guess this was induced by upgrading lenovo firmware, which I probably can downgrade back. But is there any better solution? How to get rid of this PRIME display, which is rather sub-prime, since it does not display anything and just makes your work harder.

Zanna
  • 72,312
Martin Mucha
  • 493

1 Answers1

25

The work around can be found in @ maarallez's answer in this Reddit thread: Weird second display: nvidia PRIME Display (some formatting added by me):

You can disable the ghost screen by writing a short config file.

First, open a terminal and run xrandr to identify your screens. Take note of the name of the ghost device (e.g. HDMI-0, DP-0, etc.); mine was None-1-1.

Then create your config file:

sudo gedit /etc/X11/xorg.conf.d/10-monitor.conf

Paste the following, making sure to replace the VGA1 with the name you identified in the previous step:

Section "Monitor"
Identifier "VGA1"
Option "Ignore" "true"
EndSection

Save the file and reboot.

BeastOfCaerbannog
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amar
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