Blender popup windows open on the wrong screen #90752

New Issue

System Information
Operating system: Windows 10 21H1
Graphics card: ZOTAC 3070 TI

Blender Version
Broken: version: 2.93.3, branch: master, commit date: 2021-08-17 18:30, hash: 8b80d19f36, type: release

On multiple monitor setup (4 Monitors)
In Blender all popup windows (i. e. preferences, file browsers etc.) open on the wrong monitor while the main screen of blender opens on the primary.
After repositioning it and save as default startup file the main window start on the wrong monitor (not the primary). This is the same monitor where the other popup windows opened before.

By the way: Sometimes if a popup moved from the wrong monitor to the correct one blender crashes with a weird window animation like he opens the window 100x times.
But that looks like a Windows 10 Bug !?

If the default .blend file is needed (which really is the default one after installation, then response please.

Greetings
DaRkMaN1984

**System Information** Operating system: Windows 10 21H1 Graphics card: ZOTAC 3070 TI **Blender Version** Broken: version: 2.93.3, branch: master, commit date: 2021-08-17 18:30, hash: 8b80d19f3641, type: release On multiple monitor setup (4 Monitors) In Blender all popup windows (i. e. preferences, file browsers etc.) open on the wrong monitor while the main screen of blender opens on the primary. After repositioning it and save as default startup file the main window start on the wrong monitor (not the primary). This is the same monitor where the other popup windows opened before. By the way: Sometimes if a popup moved from the wrong monitor to the correct one blender crashes with a weird window animation like he opens the window 100x times. But that looks like a Windows 10 Bug !? If the default .blend file is needed (which really is the default one after installation, then response please. Greetings DaRkMaN1984

Added subscriber: @DaRkMaN1984

Added subscriber: @Harley

I'd like a description of how your monitors are arranged and which one is primary.

Note that if you have a vertical arrangement of monitors (where any are above any others) then you might find different results with version 3.0

I'd like a description of how your monitors are arranged and which one is primary. Note that if you have a vertical arrangement of monitors (where any are above any others) then you might find different results with version 3.0

In #90752#1208059, @Harley wrote:
I'd like a description of how your monitors are arranged and which one is primary.

``` ```

TV2	MON3	MON4
	MON1

Mon1 is primary. If I open preferences the window opens on TV in the top left corner (if it helps). All monitors have horizontal alignment.

Following steps which I tried:
Unplug all except the primary and reinstall the graphics driver. After restart I plugged all back and same happend. (even with reinstall blender with complete deletion of the app data under roaming, or starting it before plugin all back)

Tried to save the default blend file while monitors are unplugged... Same result.

But we're still on version 2.93.3 on LTS. If I remember 2.91 worked fine?

> In #90752#1208059, @Harley wrote: > I'd like a description of how your monitors are arranged and which one is primary. > <table> ``` <tr> <td>TV2</td> <td>MON3</td> <td>MON4</td> </tr> <tr> <td></td> <td>MON1</td> <td></td> </tr> ``` </table> Mon1 is primary. If I open preferences the window opens on TV in the top left corner (if it helps). All monitors have horizontal alignment. Following steps which I tried: Unplug all except the primary and reinstall the graphics driver. After restart I plugged all back and same happend. (even with reinstall blender with complete deletion of the app data under roaming, or starting it before plugin all back) Tried to save the default blend file while monitors are unplugged... Same result. But we're still on version 2.93.3 on LTS. If I remember 2.91 worked fine?

@DaRkMaN1984 wrote:

TV2 MON3 MON4

MON1

Yes, this an arrangement of monitors where three are above one. This should work well on Blender 3.0 but will work strangely on 2.93

But we're still on version 2.93.3 on LTS. If I remember 2.91 worked fine?

It might have seemed so for this situation but many other things were broken.

With 2.91 - and it differed depending on your setup - basically everything launched on the primary monitor and all children opened on the parent's monitor - even if that was not what you wanted.

With 2.93, if all your monitors are in a horizontal row, then you can save the main blender window anywhere you want and it will be there when you open the file again. Children also open exactly where you left them. But this change to allow windows to be saved/restored anywhere on your entire desktop exposed an error in our calculation of desktop height which results in your children opening in the wrong monitor or at wrong position.

This was fixed in 3.0 along with a couple other small changes, like the windows will be positioned perfectly even if the monitors differ in scale, instead of being out by a few pixels.

> @DaRkMaN1984 wrote: > > <table> > <tr> > <td>TV2</td> > <td>MON3</td> > <td>MON4</td> > </tr> > <tr> > <td></td> > <td>MON1</td> > <td></td> > </tr> > </table> > Yes, this an arrangement of monitors where three are above one. This should work well on Blender 3.0 but will work strangely on 2.93 > But we're still on version 2.93.3 on LTS. If I remember 2.91 worked fine? It might have seemed so for this situation but many other things were broken. With 2.91 - and it differed depending on your setup - basically everything launched on the primary monitor and all children opened on the parent's monitor - even if that was not what you wanted. With 2.93, if all your monitors are in a horizontal row, then you can save the main blender window anywhere you want and it will be there when you open the file again. Children also open exactly where you left them. But this change to allow windows to be saved/restored anywhere on your entire desktop exposed an error in our calculation of desktop height which results in your children opening in the wrong monitor or at wrong position. This was fixed in 3.0 along with a couple other small changes, like the windows will be positioned perfectly even if the monitors differ in scale, instead of being out by a few pixels.

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

Okay then let's wait for the 3.0 LTS. Afraid that the add-ons won't work with the Beta :)

Yes, sorry about that.

Although the change that fixed this issue is a one-liner, https://developer.blender.org/D10637, situations like this are not seen by many people (Windows only, multiple monitors, where any are above any others), so it is difficult to consider backporting this to an LTS.

It might help if you were to test the 3.0 Beta just to confirm it works as you expect. And then comment here perhaps. Maybe that could be considered toward backporting to 2.93

Yes, sorry about that. Although the change that fixed this issue is a one-liner, https://developer.blender.org/D10637, situations like this are not seen by many people (Windows only, multiple monitors, where any are above any others), so it is difficult to consider backporting this to an LTS. It *might* help if you were to test the 3.0 Beta just to confirm it works as you expect. And then comment here perhaps. Maybe that could be considered toward backporting to 2.93

I'll give it a try this night and give you a response.

After testing the current 3.0.0 Alpha (branch: master, commit date: 2021-08-18 20:22, hash: a217e043be)
yeah.. it works like expected.

After testing the current 3.0.0 Alpha (branch: master, commit date: 2021-08-18 20:22, hash: a217e043be2d) yeah.. it works like expected.

Added subscriber: @lichtwerk

Changed status from 'Confirmed' to: 'Resolved'

Seems like the fix is in current master and also 2.93.5 LTS, will close report then.

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Blender popup windows open on the wrong screen #90752