Arch Linux

max19561

Member

Registered: 2023-06-09

Posts: 6

Virtual Monitor

Hello,
I'm trying to create a virtual screen to use as a second screen with my tablet. The problem is that I have an error. Here's what I did as a command

$ cvt 1920 1080 60
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
$ xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
$ xrandr --addmode DP-2 "1920x1080_60.00"
$ xrandr --output DP-2 --mode "1920x1080_60.00" --left-of eDP-1 

Here is the error I get

X Error of failed request: BadMatch (invalid parameter attributes)
  Major opcode of failed request: 140 (RANDR)
  Minor opcode of failed request: 7 (RRSetScreenSize)
  Serial number of failed request: 40
  Current serial number in output stream: 41

Namely, it crops my screen and I'm forced to type

 xrandr -s 0 

to get my display back

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,677

Re: Virtual Monitor

If you would like this thread moved, let me know.

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The shortest way to ruin a country is to give power to demagogues.— Dionysius of Halicarnassus
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max19561

Member

Registered: 2023-06-09

Posts: 6

Re: Virtual Monitor

If you would like this thread moved, let me know.

yes please

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,694

Re: Virtual Monitor

Like https://wiki.archlinux.org/title/Extrem … DMI_output ?
Othereise "create a "virtual screen"" why and for what?

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max19561

Member

Registered: 2023-06-09

Posts: 6

Re: Virtual Monitor

Like https://wiki.archlinux.org/title/Extrem … DMI_output ?

I already try it on HDMI and i got full black and can do anything.

Othereise "create a "virtual screen"" why and for what?

I want to use my tablet as second screen for my laptop

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,677

Re: Virtual Monitor

If you would like this thread moved, let me know.

yes please

Where to?

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
The shortest way to ruin a country is to give power to demagogues.— Dionysius of Halicarnassus
---
How to Ask Questions the Smart Way

max19561

Member

Registered: 2023-06-09

Posts: 6

Re: Virtual Monitor

If you would like this thread moved, let me know.

yes please

Where to?

Application & desktop environments

Moderator Edit:  Done

Last edited by ewaller (2023-06-09 14:58:01)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,694

Re: Virtual Monitor

I already try it on HDMI and i got full black and can do anything.

This isn't about the output, but on how to forced it to be active.

I want to use my tablet as second screen for my laptop

Yes, but by which vector (eg. vnc or something else)

Edit: yeah, whatever…

Last edited by seth (2023-06-09 14:58:36)

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max19561

Member

Registered: 2023-06-09

Posts: 6

Re: Virtual Monitor

This isn't about the output, but on how to forced it to be active.

When i say i try with HDMI i mean i try the method they give with HDMI like what you send me

Yes, but by which vector (eg. vnc or something else)

With Deskreen

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,694

Re: Virtual Monitor

According to their homepage you need a virtual display adapter (ie. a physical dongle)

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