Arch Linux

cybercountry

Member

Registered: 2023-08-08

Posts: 10

[SOLVED] Single Monitor Detected as Dual

Hey,

I'm dealing with an annoying issue where my system mistakenly detects two monitors when only one is connected. The main monitor, labeled VGA-0, is working fine, but an additional monitor called None-1-1 is being detected without any physical connection.

```
Screen 0: minimum 8 x 8, current 2390 x 768, maximum 16384 x 16384
VGA-0 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 410mm x 230mm
   1366x768      59.79*+

HDMI-0 disconnected (normal left inverted right x axis y axis)

DVI-D-0 disconnected (normal left inverted right x axis y axis)

None-1-1 connected (normal left inverted right x axis y axis)
   1024x768      60.00 +
```

Despite having only one monitor, this detection problem is causing some inconvenience. I tried disabling the strange display using xrandr, but the problem persists.

Any suggestions on how to resolve this issue and disable unnecessary display would be greatly appreciated. Thanks!

Some information that may be useful:

Linux: 6.6.11-1-lts
Nvidia proprietary drivers: nvidia-lts 1:545.29.06-11
DE: Gnome

Last edited by cybercountry (2024-04-03 17:42:29)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,156

Re: [SOLVED] Single Monitor Detected as Dual

That's the simpledrm device, add

nvidia-drm.modeset=1

to your kernel parameters: https://wiki.archlinux.org/title/NVIDIA … de_setting

cybercountry

Member

Registered: 2023-08-08

Posts: 10

Re: [SOLVED] Single Monitor Detected as Dual

Thanks a lot for help with the issue.
Adding nvidia-drm.modeset=1 to the GRUB configuration worked like a charm.

How can I mark the post as resolved?

d.ALT

Member

Registered: 2019-05-10

Posts: 959

Re: [SOLVED] Single Monitor Detected as Dual

Add [SOLVED] by editing the title on your 1s post.

---

<49,17,III,I>    Fama di loro il mondo esser non lassa;
<50,17,III,I>    misericordia e giustizia li sdegna:
<51,17,III,I>    non ragioniam di lor, ma guarda e passa.

cybercountry

Member

Registered: 2023-08-08

Posts: 10

Re: [SOLVED] Single Monitor Detected as Dual

Done! Thanks

cybercountry

Member

Registered: 2023-08-08

Posts: 10

Re: [SOLVED] Single Monitor Detected as Dual

Hello

I'm here to revive this topic because I'm having this problem again, I did the same method to try to solve it but I wasn't successful.

I completely changed my hardware, except for the GPU which is still the same. And my current Linux and graphics drivers are: 6.6.23 and NVIDIA video drivers 550.67

Any suggestions pls?

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,287

Re: [SOLVED] Single Monitor Detected as Dual

Enable https://wiki.archlinux.org/title/NVIDIA … de_setting - use the "nvidia_drm.modeset=1" kernel parameter (modprobe.conf won't do!)

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cybercountry

Member

Registered: 2023-08-08

Posts: 10

Re: [SOLVED] Single Monitor Detected as Dual

It worked!

I was stupid and made a typing error in the parameter, reviewing it now I was able to correct it. Thank you very much!

Last edited by cybercountry (2024-04-03 17:42:13)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,287

Re: [SOLVED] Single Monitor Detected as Dual

Just editing that file does absolutely nothing, you'd still have to grub-mkconfig

cat /proc/cmdline

to see whether it applied.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc