Bug 478093

Summary: windows appear upside down in present windows effect if too many are open
Product: [Plasma] kwin Reporter: fanzhuyifan
Component: effects-present-windowsAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: minor CC: nate
Priority: NOR Keywords: qt6
Version First Reported In: master   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: upside down windows

Description fanzhuyifan 2023-12-05 05:45:41 UTC 
Created attachment 163889 [details]
upside down windows

SUMMARY
***
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***


STEPS TO REPRODUCE
1. Open a bunch of windows (I did seq 1 10 | xargs -I{} bash -c "xclock -geometry 200x200 &")
2. Toggle present windows

OBSERVED RESULT
Some windows are upside down (see attachment)

EXPECTED RESULT
All windows are right side up

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.90.0
KDE Frameworks Version: 5.246.0
Qt Version: 6.6.0
Kernel Version: 6.2.0-37-generic (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
I had the minimal overlap window placement.
The output of kscreendoctor -o is

Output: 1 eDP-1
        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: 1920,0 1707x1067
        Scale: 1.5
        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:  0:1920x1080@60*!  1:1920x1080@72  2:1920x1080@60  3:1920x1080@50  4:1680x1050@60  5:1600x900@60  6:1280x1024@60  7:1440x900@60  8:1280x800@60  9:1280x720@60  10:1280x720@60  11:1280x720@50  12:1024x768@70  13:1024x768@60  14:800x600@72  15:800x600@60  16:800x600@56  17:720x576@50  18:720x480@60  19:640x480@73  20:640x480@60 
        Geometry: 0,0 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
Comment 1 fanzhuyifan 2023-12-05 06:34:49 UTC 
I also trigger this without fractional scaling:

Output: 1 eDP-1
        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: 1920,0 2560x1600
        Scale: 1
        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:  0:1920x1080@60*!  1:1920x1080@72  2:1920x1080@60  3:1920x1080@50  4:1680x1050@60  5:1600x900@60  6:1280x1024@60  7:1440x900@60  8:1280x800@60  9:1280x720@60  10:1280x720@60  11:1280x720@50  12:1024x768@70  13:1024x768@60  14:800x600@72  15:800x600@60  16:800x600@56  17:720x576@50  18:720x480@60  19:640x480@73  20:640x480@60 
        Geometry: 0,0 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none


This is also triggered without opening a ton of windows.
Comment 2 fanzhuyifan 2023-12-05 06:36:11 UTC 
(In reply to fanzhuyifan from comment #1)
> I also trigger this without fractional scaling:
> 
> Output: 1 eDP-1
>         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: 1920,0 2560x1600
>         Scale: 1
>         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:  0:1920x1080@60*!  1:1920x1080@72  2:1920x1080@60 
> 3:1920x1080@50  4:1680x1050@60  5:1600x900@60  6:1280x1024@60  7:1440x900@60
> 8:1280x800@60  9:1280x720@60  10:1280x720@60  11:1280x720@50  12:1024x768@70
> 13:1024x768@60  14:800x600@72  15:800x600@60  16:800x600@56  17:720x576@50 
> 18:720x480@60  19:640x480@73  20:640x480@60 
>         Geometry: 0,0 1920x1080
>         Scale: 1
>         Rotation: 1
>         Overscan: 0
>         Vrr: incapable
>         RgbRange: unknown
>         HDR: incapable
>         Wide Color Gamut: incapable
>         ICC profile: none
> 
> 
> This is also triggered without opening a ton of windows.

Sorry that comment was meant for another bug report.
Comment 3 Nate Graham 2023-12-05 17:16:23 UTC 
Same root cause as Bug 477103, and same fix.

*** This bug has been marked as a duplicate of bug 477103 ***