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New to capture cards, will this setup work?

kir13y
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So I carry around an ubuntu laptop for the work that I do as well as a surface pro as a writing tablet/windows device. There are times where I want to be able to use the surface as a second monitor like apple sidecar. I want to do it over cable so that I can work without an internet connection and with minimal software on the linux machine.

 

I'm thinking of getting a cheap capture card, connecting the HDMI output of my laptop to the card input, and then viewing the output on the surface (through OBS or a similar software.) The thing that I'm unsure about is if the ubuntu laptop will be able to extend my desktop instead of just duplicating my display. Does the capture card show up as a second monitor (like when connecting an external display) or does it show up differently? Any advice would be greatly appreciated, thanks for reading!

Main PC - Windows 10 (https://pcpartpicker.com/b/xjf8TW)

Spoiler

CPU: i7 6800k @4.2GHz (Kraken x61)

Mobo: ASUS x99 Gaming

GPU: ASUS GTX 1080 STRIX

RAM: 32GB DDR4 Ram

Storage: Intel 600p NVMe PCIe SSD (512GB), 2TB WD Green, 500GB WD Blue

Case: Phanteks Enthoo Evolv ATX

PSU: EVGA 850W 80+ Gold Modular PSU

Display: ASUS PH278Q (1440p 144hz gsync)

Keyboard: Corsair K95 RGB (MX Brown)

Mouse: Logitech G502 Spectrum

Audio: Logitech G930 Headset, Logitech Z506 5.1 Speakers

 
 

Server - Ubuntu

Spoiler

CPU: i5 3470 @3.2GHz (Stock)

RAM: 16GB DDR3 Ram

Storage: 2TB WD Green

 
 
 

Gaming Laptop - ASUS ROG G751JT-WH71(WX) - Windows 10

Spoiler

CPU: i7 4720HQ @2.6GHz

GPU: GTX 970M (3GB)

RAM: 16GB DDR3

Storage: 500GB Samsung 850 Evo, 1TB Toshiba HDD

Display: 17.3" display (1080p 75hz gsync)

 
 
 

Work Laptop - Razer Blade Stealth - Debian + KDE

Spoiler

CPU: i7 7500U @2.7GHz / 3.5GHz (Base/Turbo)

RAM: 16GB

Storage: 512GB M.2 SSD

Display: 13.3" QHD+ 3200x1800 touchscreen (16:9)

 
 

 

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