Failed to set display 'Generic PnP Monitor' to Hdmi1(0x11)

[averyoefinger]

Let me start by just saying how great this project is, I'm really eager to get it up and running!

Setup:

• Running Windows 10 PC with Nvidia GTX 1080 plugged into a Dell S2716DG Display Port. Using USB 3.0 KVM made by IOGEAR. The second machine is an HP laptop connected by HDMI (I'm currently only running the display_switch.exe on my PC).
• The contents of my config file C:\Users\avery\AppData\display-switch\display-switch.ini

  usb_device = "1B1C:1B3E"
  on_usb_connect = "DisplayPort1"
  on_usb_disconnect = "Hdmi1"

• Built the program as specified in the README; run it from the cmd line.

Expected outcome: pressing the KVM button toggles the monitor input between PC and laptop display.

Actual outcome: There is output in the log (C:\Users\avery\AppData\Local\display-switch\display-switch.log)

01:42:55 [DEBUG] (1) display_switch::app: Detected device change. Removed device: "1b1c:1b3e"
01:42:55 [INFO] Monitored device is ("1b1c:1b3e") is disconnected
01:42:55 [DEBUG] (1) display_switch::display_control: Setting display 'Generic PnP Monitor' to Hdmi1(0x11)
01:42:55 [ERROR] Failed to set display 'Generic PnP Monitor' to Hdmi1(0x11) (Os { code: -1071241854, kind: Other, message: "An error occurred while transmitting data to the device on the I2C bus." })
01:42:55 [DEBUG] (1) display_switch::display_control: Setting display 'GP104-A/2147881088:Lvds' to Hdmi1(0x11)
01:42:55 [ERROR] Failed to set display 'GP104-A/2147881088:Lvds' to Hdmi1(0x11) (I2c(Error))
01:42:55 [DEBUG] (1) display_switch::app: Detected device change. Removed device: "1b1c:1b13"
01:42:55 [DEBUG] (1) display_switch::app: Detected device change. Removed device: "0bda:5411"
01:42:58 [DEBUG] (1) display_switch::app: Detected device change. Removed device: "0000:0000"
01:43:05 [DEBUG] (1) display_switch::app: Detected device change. Added device: "0bda:5411"
01:43:06 [DEBUG] (1) display_switch::app: Detected device change. Added device: "1b1c:1b13"
01:43:06 [DEBUG] (1) display_switch::app: Detected device change. Added device: "1b1c:1b3e"
01:43:06 [INFO] Monitored device ("1b1c:1b3e") is connected
01:43:06 [DEBUG] (1) display_switch::display_control: Setting display 'Generic PnP Monitor' to DisplayPort1(0xf)
01:43:06 [ERROR] Failed to set display 'Generic PnP Monitor' to DisplayPort1(0xf) (Os { code: -1071241854, kind: Other, message: "An error occurred while transmitting data to the device on the I2C bus." })
01:43:06 [DEBUG] (1) display_switch::display_control: Setting display 'GP104-A/2147881088:Lvds' to DisplayPort1(0xf)
01:43:06 [ERROR] Failed to set display 'GP104-A/2147881088:Lvds' to DisplayPort1(0xf) (I2c(Error))

[haimgel]

Hello, Unfortunately, it seems like your monitor (Dell S2716DG) does not support DDC/CI controls: https://www.dell.com/community/Monitors/S2716DG-Dell-DDM-is-not-supported/td-p/6072319

Granted, this is not an authoritative source, and if you're sure it is supported and should work, I suggest trying to control it with some other DDC/CI software to make sure the issue is indeed display-switch software and not lack of hardware support.