Bug 481868

Summary: [Desktop grid] dragging window from screen A to screen B makes the window still show up in screen A
Product: [Plasma] kwin Reporter: fanzhuyifan
Component: effects-overviewAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: dashonwwIII, dev, kde, nate, postix
Priority: NOR Keywords: multiscreen, qt6
Version First Reported In: git master   
Target Milestone: ---   
Platform: Other   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=481331
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description fanzhuyifan 2024-02-26 17:33:13 UTC 
SUMMARY
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***


STEPS TO REPRODUCE
1. enter gridview,
2. drag a window from desktop 1 on screen A to desktop 2 on screen B. 

OBSERVED RESULT
In the gridview effects it will show up at desktop 2 on screen A, while in reality it has been moved to desktop 2 on screen B.

EXPECTED RESULT
In the gridview effects it should show up at desktop 2 on screen B, 

SOFTWARE/OS VERSIONS

Git master build of kwin.

Operating System: Arch Linux 
KDE Plasma Version: 6.0.80
KDE Frameworks Version: 6.0.0
Qt Version: 6.7.0
Kernel Version: 6.7.6-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 20 × 13th Gen Intel® Core™ i9-13900H
Memory: 15.2 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: ROG Zephyrus G16 GU603VV_GU603VV
System Version: 1.0

ADDITIONAL INFORMATION

Yes, this happens despite many recent fixes.
I use 9 virtual desktops arranged in a 3x3 grid.
Now this only happens with one of my external monitors.
The output of kscreen-doctor -o:

Output: 1 eDP-2
        enabled
        connected
        priority 1
        Panel
        Modes:  0:2560x1600@240!  1:2560x1600@60*  2:1600x1200@60  3:1280x1024@60  4:1024x768@60  5:2560x1600@60  6:1920x1200@60  7:1280x800@60  8:2560x1440@60  9:1920x1080@60  10:1600x900@60  11:1368x768@60  12:1280x720@60
        Geometry: 2259,42 1897x1186
        Scale: 1.35
        Rotation: 1
        Overscan: 0
        Vrr: Automatic
        RgbRange: Automatic
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
Output: 2 HDMI-A-1
        enabled
        connected
        priority 2
        HDMI
        Modes:  0:3840x2160@60*!  1:3840x2160@60  2:3840x2160@50  3:3840x2160@30  4:3840x2160@30  5:3840x2160@25  6:3840x2160@24  7:1920x2160@60  8:2560x1440@60  9:2048x1280@60  10:1920x1080@60  11:1920x1080@60  12:1920x1080@50  13:1920x1080@24  14:1600x1200@60  15:1280x1024@75  16:1280x1024@60  17:1280x800@60  18:1152x864@75  19:1280x720@60  20:1280x720@50  21:1024x768@75  22:1024x768@60  23:800x600@75  24:800x600@60  25:720x576@50  26:720x480@60  27:640x480@75  28:640x480@60  29:640x480@60
        Geometry: 0,0 2259x1271
        Scale: 1.7
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
Comment 1 Nate Graham 2024-02-27 17:42:17 UTC 
Cannot reproduce the issue with current git master. I set my system up like yours: a 3x3 grid of desktops and two screens. My external screen is even connected via HDMI, like yours. Then I enter grid view by doing a four-finger downward swipe on my touchpad. In this view, I drag a window from desktop 1 on screen A to desktop 2 on screen B. It does what I expect.
Comment 2 fanzhuyifan 2024-02-27 17:52:00 UTC 
(In reply to Nate Graham from comment #1)
> Cannot reproduce the issue with current git master. I set my system up like
> yours: a 3x3 grid of desktops and two screens. My external screen is even
> connected via HDMI, like yours. Then I enter grid view by doing a
> four-finger downward swipe on my touchpad. In this view, I drag a window
> from desktop 1 on screen A to desktop 2 on screen B. It does what I expect.

This only happens with my 4K external monitor, and not with my other 1920x1080 external monitor. It reproduces most consistently when I drag a window between desktop 4 and desktop 5 across screens (or between 5 and 8). It happens both when I use gesture and shortcut to trigger.
Comment 3 fanzhuyifan 2024-02-28 06:15:13 UTC 
Update: this does not only occur with my 4k monitor. It happens on both monitors I have.

Right now my suspicion is that it only happens with maximized wayland windows (e.g., maximized firefox with wayland backend, and maximized dolphin). It does not happen when these are not maximized, and it does not seem to happen with xwayland windows (like slack).
Comment 4 David Edmundson 2024-02-28 14:00:23 UTC 
When you say gridview, do you mean the overview effect?

If so, this is can be considered a duplicate of 481331 which is fixed next release
Comment 5 fanzhuyifan 2024-02-28 14:15:15 UTC 
(In reply to David Edmundson from comment #4)
> When you say gridview, do you mean the overview effect?
> 
> If so, this is can be considered a duplicate of 481331 which is fixed next
> release

Desktop grid from overview.

I am running a source build of kwin from yesterday (bc62e7e094), which includes the fixes for 481331, and I can still reproduce this.
Comment 6 Nate Graham 2024-03-01 20:05:50 UTC 
Same.
Comment 7 fanzhuyifan 2024-03-19 18:02:06 UTC 
*** Bug 482923 has been marked as a duplicate of this bug. ***
Comment 8 fanzhuyifan 2024-08-12 06:07:36 UTC 
Seems fixed for me on git master.