kvm-switch
ddcutil
kvm-switch | ddcutil | |
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4 | 47 | |
12 | 862 | |
- | - | |
3.6 | 9.9 | |
almost 2 years ago | 3 days ago | |
Go | C | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
kvm-switch
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Show HN: Multi-monitor KVM using just a USB switch
With my COVID obsession of live streaming while writing code, I ended up building something a little more elaborate. https://github.com/timgws/kvm-switch
It doesn't use DDC commands direct to the monitor(s), instead swapping it for a HDMI matrix combined with a traditional KVM for swapping around inputs smoothly when you roll your mouse over the edge of different operating systems.
The switching client runs on Windows, MacOS and Linux (if you use X).
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Displayport: A Better Video Interface
I had the same issue with this device. I ended up writing some code that you could run on a machine to operate the switching via the RS232 port: https://github.com/timgws/kvm-switch/
Bonus for adding 'glide and switch' functionality, so you can move the mouse to the edge of the screen and it would jump the input to the next display in your layout. It's like a hardware version of Synergy.
Very finicky device, but if you don't touch it - and you don't use any of the shortcuts - it works.
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Ask HN: What is something you built but never marketed?
The proverb 'necessity is the mother of invention' made me build a solution for sharing a keyboard and mouse between multiple devices.
Synergy/Barrier is not horrible, but I find the latency a little painful.
Ended up getting an industrial HDMI switch, with a KVM. Built a server in Go that connects to the serial port of all the devices.
A companion client that runs on all the machines tells the server when the mouse moves to the edge of the screen, so the USB inputs can be switched to the correct computer. Basically, it allows you to have multiple computers connected, to multiple displays, sharing one keyboard and mouse. (You can define layouts on the server, so the displays can move around on the matrix HDMI switcher).
https://github.com/timgws/kvm-switch
- Show HN: Send commands to KVM/HDMI matrix devices when touching screen edge
ddcutil
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Show HN: Multi-monitor KVM using just a USB switch
Apologies. I hate when people do that as well.
In addition to the other links posted, ddcutil.org has some more good info: https://www.ddcutil.com/#introduction
- Scrollbars Are Becoming a Problem
- CEC over DisplayPort
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Recommandations KVM
Sous Linux j'avais utilisé ddcutil
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Connecting a Display Port 1.4 graphics card to the Dell thunderbolt dock WD22TB4
Most monitors have a Virtual Control Panel (VCP), which implements features defined in the Monitor Control Command Set (MCCS). This is a VESA standard. You can find the Input selection command in table 8-10. You send these commands over an I2C bus called Display Data Channel/Command Interface which is yet another VESA standard. If you are running Windows https://www.nirsoft.net/utils/control_my_monitor.html will let you use every VCP feature your monitor has. For Linux, https://www.ddcutil.com/ does this. For Mac, https://github.com/alin23/Lunar
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Opinions on functional & performance requirements for a desktop TB/USB4 AIC
The protocol is called DDC , it's a VESA standard. In there, it's called VCP features. If you are running Windows https://www.nirsoft.net/utils/control_my_monitor.html will let you use every VCP feature your monitor has. For Linux, https://www.ddcutil.com/ does this. For Mac, https://github.com/alin23/Lunar note how all three mention input selection.
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TIL there are apps that can control your monitor without touching the buttons on it
ddcutil (a command-line tool, and what most UI tools are based on)
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'monitorctl' cli tool to control brightness, contrast and volume of external monitors on linux
A related non rust tool (that also has an optional GUI) is ddcutil. How does this compare to that?
- I built a widget to adjust the brightness of external monitors
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Brightness issue
I've also used ddcui: https://www.ddcutil.com/#introduction, available as an AUR package: https://github.com/rockowitz/ddcutil. This has a nice GUI: https://www.ddcutil.com/screenshots/ddcui_features.png and works on everything I've tried it on out of the box.
What are some alternatives?
ViGEmClient - ViGEm Client SDK for feeder development.
winddcutil - Windows implementation of the ddcutil Linux program for querying and changing monitor settings, such as brightness and color levels.
cyclicbarrier - CyclicBarrier golang implementation
ddcctl - DDC monitor controls (brightness) for Mac OSX command line
india-pincode-regex - A simple regex based exhaustive validator for PIN codes in India
Clight - A C daemon that turns your webcam into a light sensor. It will adjust screen backlight based on ambient brightness.
keyAlarm - An alarm that prevents you from typing too much.
MonitorControl - 🖥 Control your display's brightness & volume on your Mac as if it was a native Apple Display. Use Apple Keyboard keys or custom shortcuts. Shows the native macOS OSDs.
youtube2Anki - Convert Youtube Transcripts to Anki cards
soft-brightness - Gnome-shell extension to manage your display brightness via an alpha overlay (instead of the backlight).
netbase - 🌐 Netbase : Semantic Graph Database & Wikidata Server
open-USB-display-service-utility - Reverse engineering of the apple display service utilty