Regression: Windows-10 Switching Desktops locks Ctrl Key #100582

New Issue

Julien Kaspar · 2022-08-23T12:48:40+02:00

Julien Kaspar commented

2022-08-23 12:48:40 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.59

Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-22 16:16, hash: 7f6cd405b9
Worked: version 3.3 Beta
Caused by 8bc76bf4b9

Short description of error
I often encountered while working on Windows, that from time to time the Ctrl key would get locked (always held) even though I am not pressing it. Repeatedly pressing and releasing the key would fix the issue.

Finally I found a way to reproduce the issue for me. I organise open windows into separate Desktops that I switch between regularly.
Whenever I switch between them, if Blender was the active window at the time, the Ctrl key would get stuck.
This is likely the case because the shortcut to switch Desktops is Ctrl + Windows Key + Left/Right Arrow.

I think this issue is specific to Blender and not just Windows 10, because other programs do not have this issue.

Exact steps for others to reproduce the error

Create a second Desktop on Windows 10
Open Blender on the first Desktop
Use Ctrl + Windows Key + Right Arrow to switch to the other Desktop
Switch back with Ctrl + Windows Key + Left Arrow
Use the middle mouse button to pan in the viewport

Instead of panning it will zoom in the viewport instead.

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.59 **Blender Version** Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-22 16:16, hash: `7f6cd405b9` Worked: version 3.3 Beta Caused by 8bc76bf4b9 **Short description of error** I often encountered while working on Windows, that from time to time the `Ctrl` key would get locked (always held) even though I am not pressing it. Repeatedly pressing and releasing the key would fix the issue. Finally I found a way to reproduce the issue for me. I organise open windows into separate Desktops that I switch between regularly. Whenever I switch between them, if Blender was the active window at the time, the `Ctrl` key would get stuck. This is likely the case because the shortcut to switch Desktops is `Ctrl + Windows Key + Left/Right Arrow`. I think this issue is specific to Blender and not just Windows 10, because other programs do not have this issue. **Exact steps for others to reproduce the error** - Create a second Desktop on Windows 10 - Open Blender on the first Desktop - Use `Ctrl + Windows Key + Right Arrow` to switch to the other Desktop - Switch back with `Ctrl + Windows Key + Left Arrow` - Use the middle mouse button to pan in the viewport Instead of panning it will zoom in the viewport instead.

Julien Kaspar commented

2022-08-23 12:48:40 +02:00

Added subscriber: @JulienKaspar

Pratik Borhade commented

2022-08-23 15:16:25 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-08-23 15:16:25 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Pratik Borhade commented

2022-08-23 15:16:25 +02:00

I can confirm

Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.78```

I can confirm ```**System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.78```

Pratik Borhade commented

2022-08-23 15:23:27 +02:00

Is probably a regression because I'm not able too repro it in 3.3 build.
@JulienKaspar, can you also check in beta build? And raise the priority if it's a regression.
(I won't be able to bisect before tomorrow)

Is probably a regression because I'm not able too repro it in 3.3 build. @JulienKaspar, can you also check in beta build? And raise the priority if it's a regression. (I won't be able to bisect before tomorrow)

Pratik Borhade changed title from ~~Windows 10: Switching Desktops locks Ctrl Key~~ to Regression: Windows-10 Switching Desktops locks Ctrl Key

2022-08-23 15:34:32 +02:00

Pratik Borhade commented

2022-08-25 08:43:06 +02:00

Added subscriber: @ideasman42

Pratik Borhade commented

2022-08-25 08:43:06 +02:00

Affected by 8bc76bf4b9
cc @ideasman42

Affected by 8bc76bf4b9 cc @ideasman42

Campbell Barton self-assigned this 2022-08-25 14:36:56 +02:00

Campbell Barton commented

2022-08-25 14:36:56 +02:00

While reverting 8bc76bf4b9 will resolve this issue, it seems existing logic to simulate key release events is failing for windows.

Are you pressing/releasing the right Control key?

Submitted D15782 which removes simulated key events and clears the event modifier directly, building on the build-bot, should be available at https://builder.blender.org/download/patch/ (on Windows) shortly.

While reverting 8bc76bf4b9 will resolve this issue, it seems existing logic to simulate key release events is failing for windows. Are you pressing/releasing the right Control key? Submitted [D15782](https://archive.blender.org/developer/D15782) which removes simulated key events and clears the event modifier directly, building on the build-bot, should be available at https://builder.blender.org/download/patch/ (on Windows) shortly.

Pratik Borhade commented

2022-08-25 15:42:38 +02:00

Applying D15782 manually has not solved the issue :/

Are you pressing/releasing the right Control key?

Even with left ctrl key issue is reproducible.

Applying [D15782](https://archive.blender.org/developer/D15782) manually has not solved the issue :/ > Are you pressing/releasing the right Control key? Even with left ctrl key issue is reproducible.

Campbell Barton commented

2022-08-26 10:50:59 +02:00

This is caused by GHOST/Win32 having it's own layer of modifier key handling which causes key modifier release events to be incorrectly ignored after the window is activated.
I'll prepare a fix shortly.

This is caused by GHOST/Win32 having it's own layer of modifier key handling which causes key modifier release events to be incorrectly ignored after the window is activated. I'll prepare a fix shortly.

blender-admin commented

2022-08-26 14:24:08 +02:00

This issue was referenced by 37d835f0bc

This issue was referenced by 37d835f0bca28a7cbf577385d9828636e7811cc5

Campbell Barton commented

2022-08-26 23:39:17 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2022-08-26 23:39:17 +02:00

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Regression: Windows-10 Switching Desktops locks Ctrl Key #100582