display-switch

As someone who is using display-switch[0] to imitate a hardware KVM switch in software I can say I’ve seen many of these issues in trying to debug the random issues that using ddc creates. Ddc is to http what your county clerk’s website is to (current) healthcare.gov essentially. There’s no standardization at all, it’s maintained by 1000 different people who don’t communicate and don’t care how anyone else is doing it because only like 1/10000 people have heard of it and 1/100000 uses it. [0] https://github.com/haimgel/display-switch

Are you thinking of the display-switch[0] script? Achieves K/V/M-switching with only a cheap USB-switch for hardware K/M-switching, and then this script detects such peripheral switching and emits DDC-commands for monitors to switch accordingly. I saw it posted here on HN[1], and have been using it since then with great success. [0] https://github.com/haimgel/display-switch [1] https://news.ycombinator.com/item?id=29608967

Not quite what you are asking for, but perhaps display-switch[0] can help. I'm too cheap to get a KVM which supports 2 4k monitors so I'm using display-switch instead. Works wonders. [0] https://github.com/haimgel/display-switch

Even outside of impedence issues, you can't just use relays because then every switch is basically an unplug/replug, meaning that: a) the display will flip out and spend multiple seconds re-syncing itself, and b) the sources may take actions such as resizing the desktop, switching to the internal display, pausing the game, whatever. Part of the point of a hardware KVM is that it negotiates its own connection to all of the devices involved, and only changes which signals are passed through at any given moment, resulting in instantaneous switchovers. Now, a multi-input monitor can also do this, but then you have to deal with whatever compat issues are involved in commanding it to switch over DDC (see for example https://github.com/haimgel/display-switch), and it typically also won't be as fast as a hardware solution since input switching sp

There was a post[0] from a couple months ago for a piece of software called 'display-switch'[1]. It turns a simple/cheap USB switch into a n-computer KVM (however many systems the USB switch supports) by detecting the presence of the USB switch device on either system and switching the video input of the monitors using DDC/CI. I've been using it for a couple of months and it's been a game changer. No more fiddling with monitor menus to switch inputs or wondering if the monitor is currently set to one computer or the other. You have to make sure your monitors support DDC/CI, though. [0] https://news.ycombinator.com/item?id=29608967 [1] https://github.com/haimgel/display-switch