Plugging in or unplugging display causes hovered editor UI element to desynchronize from mouse position.

[vektor451]

Tested versions

• Reproducible in 4.4.1, 4.4, 4.3, 4.2.1, 4.2
• Not Reproducible in 4.1.4 and before.

System information

Godot v4.4.1.stable.mono - Windows 10 (build 19045) - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated AMD Radeon RX 7700 XT (Advanced Micro Devices, Inc.; 32.0.12033.1030) - AMD Ryzen 7 5800X 8-Core Processor (16 threads)

Issue description

When plugging in or unplugging a second display with Godot Editor launched (and maximised, usually), the position of the mouse when hovering over UI elements is disconnected from the actual mouse position, for instance with the hovered element being below where your actual mouse is. When clicking, the click is still processed where your mouse actually is, rather than where the hovered element is. The issue can quickly be fixed by updating the window size, for instance unmaximizing and then maximizing the window.

If using a display such as a television (which is what I am using), when turned on or off the device is effectively treated as being plugged in or unplugged unlike a dedicated computer monitor. This isn't a large issue as it can quickly be fixed as is, however it has been persistent for me since 4.2.

Example video showcasing the issue:
https://github.com/user-attachments/assets/d8476aa9-1280-42bf-8499-3f9e2f8c501c

Steps to reproduce

• Set up position of second display to end up in a taller overall workspace than with just the first display (Use a vertical monitor, or put the second one at a higher or lower place than the first)
• Launch Godot. Either the project browser or any project is fine. Usually tends to occur when the window is maximised, however I do think it can still happen when it's not.
• Unplug or plug in your monitor, or if you're using something like a TV as a monitor, turn it on or off.
• The issue should now occur, and the hovered element is disconnected from mouse position.
• Updating the size of the window should bring things back to normal.

Minimal reproduction project (MRP)

This occurs in the Godot editor inside of any project, as well as the project list/manager.

[jas31415]

From reproducing your steps, I found that this can be reproduced in simpler steps:

• Open Godot; Project Manager or Editor, doesn't matter which
• Move the arrangement of any display in Settings>System>Display, so that the display currently occupied by Godot is not situated in the top-left. Below is a little graphic I made for intuition.
  

Subsequent ways to fix this involve:

• Minimizing and and reopening the window
• Maximizing the window
• Dragging the window around
• Resizing the window on the left-side, top-side; including the three corners these sides connect to; the other two sides and corner do not affect the state of this bug

My intuition tells me that the internal mouse position is not updated after Windows changes the location of the display in the desktop environment. But to test this is up to someone who knows how to do that stuff.

I have found that this bug is unrelated to any settings inside Settings>System>Display>Scale & Layout, so it is safe to say we can rule out any correlation between this bug and code related to those settings.
To test this I opened the Project Manager and changed the display resolution in from 1920x1080 (my full-res) to something smaller, like 1680x1050 and 800x600, flipped the orientation around, and also changed the scale. As well as combining several of them. It yielded to abnormal results, and functions fine.
This is also unrelated to what refresh rate. That might sound like a given but I thought I'd try it anyways for the record.

Finally, some interesting behavior I fail to explain is visible in the embed underneath. After reproducing these steps and hovering over a selectable element, such as a LineEdit node, it shows the correct cursor icon. However, the Button nodes in the list also think they are being hovered. And in the top-right, the tool-tip pops up as if the cursor were in reality there.
I am genuinely perplexed...

The embed in question

technical info: Godot v4.4.1.stable - Windows 11 (build 26100) - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3070 Laptop GPU (NVIDIA; 32.0.15.6119) - 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz (16 threads)