Repository: vscode
Issue: Mouse cursor becomes huge in full screen mode
Labels: under-discussion

Type: <b>Bug</b>

**Since when did this bug appear:**
Several weeks ago in **Insiders**, then today in **Stable** for me, so I guess either 1.80.1 or 1.80.0

**Symptom:**
1. When I use F11 to switch to full screen mode, the mouse cursor becomes much larger, and also teleports toward lower right, roughly 2.5x the original coords, e.g. from 100 100 to 250 250 ish. When I exit full screen mode, the cursor teleports back, and the size also returns to normal.
1. When I use alt-tab to switch between fullscreen VSCode and another non-chromium app window, the mouse cursor size and position changes back and forth in a similar way as described in 1. No issue if VSCode isn't in fullscreen mode. 

   (Switching between VSCode and another chromium app (e.g. a browser) is complicated because the latter can also enter fullscreen, details in https://github.com/microsoft/vscode/issues/188820#issuecomment-1690970704)

1. When the mouse cursor is big, if I trigger a chromium native tooltip in VSCode, the issue will be fixed, until next time I do (1) or (2).

Video demo: https://youtu.be/N5-jjarkuhk (video explanation in https://github.com/microsoft/vscode/issues/188820#issuecomment-1676078398)


**What is not the cause:**
- Zoom level in VSCode
- Zoom level in Windows settings > Display
- Mouse Pointer Size in Windows settings > Mouse > Mouse Pointer

I've tested resetting the 3 settings above, and they aren't the cause. (But if I increase the mouse pointer size in Windows Settings, it grows even bigger in VSCode)

**What may be related:**
This issue only appears in my external monitor. If I move VSCode to my laptop monitor, the issue is gone.

----

VS Code version: Code 1.80.1 (74f6148eb9ea00507ec113ec51c489d6ffb4b771, 2023-07-12T17:22:07.651Z)
OS version: Windows_NT x64 10.0.19045
Modes:

<details>
<summary>System Info</summary>

|Item|Value|
|---|---|
|CPUs|AMD Ryzen 7 5700U with Radeon Graphics          (16 x 1797)|
|GPU Status|2d_canvas: enabled<br>canvas_oop_rasterization: disabled_off<br>direct_rendering_display_compositor: disabled_off_ok<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>opengl: enabled_on<br>rasterization: enabled<br>raw_draw: disabled_off_ok<br>video_decode: enabled<br>video_encode: enabled<br>vulkan: disabled_off<br>webgl: enabled<br>webgl2: enabled<br>webgpu: enabled|
|Load (avg)|undefined|
|Memory (System)|31.33GB (10.45GB free)|
|Process Argv|--crash-reporter-id 76333b68-ca09-45f5-9a16-77e964093e64|
|Screen Reader|no|
|VM|0%|
</details>Extensions: none<details>
<summary>A/B Experiments</summary>

```
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vsreu685:30147344
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vsctsb:30748421
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pythonnosmt12:30797651
pythonidxpt:30784022
pythonnoceb:30797650
e537b577:30795824
dsvsc013:30795093
dsvsc014cf:30797590

```

</details>

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