JDK-8338751 : ConfigureNotify behavior has changed in KWin 6.2
  • Type: Bug
  • Component: client-libs
  • Affected Version: 17,21
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: linux
  • CPU: x86_64
  • Submitted: 2024-08-21
  • Updated: 2024-11-25
  • Resolved: 2024-10-16
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Unresolved : Release in which this issue/RFE will be addressed.
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JDK 17 JDK 21 JDK 23 JDK 24
17.0.14Fixed 21.0.6Fixed 23.0.2Fixed 24 b20Fixed
Related Reports
Duplicate :  
JDK-8338752 - Wrong mouse position in popup menus when running in KDE Plasma 6.2-dev
Description
A DESCRIPTION OF THE PROBLEM :
According to https://github.com/openjdk/jdk/blob/285ceb9ee51e064687da6fc3fbed984e34cf02e6/src/java.desktop/unix/classes/sun/awt/X11/XWindowPeer.java#L766, it appears like KWin is assumed to always send synthetic ConfigureNotify events. However, the internal KWin implementation details have/will be changed in 6.2 to match the behavior described in ICCCM 4.1.5, i.e. if the client window is resized, no synthetic configure notify event will be sent. The reason for that was to fix some issues during interactive resize.

Unfortunately, it breaks pointer input under certain circumstances.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Have a machine running KWin 6.2, it can be either built from source code (https://develop.kde.org/docs/getting-started/building/kdesrc-build-compile/) or one can download the KDE Neon Testing or Developer edition.

- download JDownloader2 app, and open it
- right click anywhere in the download list, dismiss the popup
- maximize the JDownloader2 window
- right click again, and hover entries in the popup window
- the context menu entries are not highlighted as expected and pointer events have an offset

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
pointer input has some offset after maximizing JDownloader2 window
ACTUAL -
no issues with pointer input

CUSTOMER SUBMITTED WORKAROUND :
If KWin is forced to pretend to be Mutter by changing the WMName property, then the issue cannot be reproduced. The issue is reproducible both in Plasma X11 and Plasma Wayland sessions.

FREQUENCY : always
Comments
[jdk17u-fix-request] Approval Request from Vlad Zahorodnii This is needed to properly fix placement issues with popups in Plasma 6.2 (and likely other issues caused by having wrong global coordinates). 6.2.1 contains a workaround, but it doesn't cover all cases. This should be a safe to backport fix. I tested the change by running a Java application (jdownloader) with KWin that always sends synthetic configure notify events (pre 6.2 behavior) and one that adheres to ICCCM 4.1.5 more strictly and doesn't always send synthetic configure notify events. This fix has already been backported to 23 and 21.
30-10-2024
[jdk21u-fix-request] Approval Request from Vlad Zahorodnii This is needed to properly fix placement issues with popups in Plasma 6.2 (and likely other issues caused by having wrong global coordinates). 6.2.1 contains a workaround, but it doesn't cover all cases. This should be a safe to backport fix. I tested the change by running a Java application (jdownloader) with KWin that always sends synthetic configure notify events (pre 6.2 behavior) and one that adheres to ICCCM 4.1.5 more strictly and doesn't always send synthetic configure notify events. This has already been backported to 23.
25-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk23u/pull/202 Date: 2024-10-22 09:36:57 +0000
22-10-2024
[jdk23u-fix-request] Approval Request from Vlad Zahorodnii This is needed to properly fix placement issues with popups in Plasma 6.2 (and likely other issues caused by having wrong global coordinates). 6.2.1 contains a workaround, but it doesn't cover all cases. This should be a safe to backport fix. I tested the change by running a Java application (jdownloader) with KWin that always sends synthetic configure notify events (pre 6.2 behavior) and one that adheres to ICCCM 4.1.5 more strictly and doesn't always send synthetic configure notify events.
22-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk21u-dev/pull/1072 Date: 2024-10-21 20:17:41 +0000
21-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk17u-dev/pull/2981 Date: 2024-10-21 20:17:11 +0000
21-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk17u/pull/404 Date: 2024-10-21 19:34:18 +0000
21-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk21u/pull/457 Date: 2024-10-21 19:33:32 +0000
21-10-2024
Changeset: 3da68900 Branch: master Author: Vlad Zahorodnii <vlad.zahorodnii@kde.org> Committer: Sergey Bylokhov <serb@openjdk.org> Date: 2024-10-16 23:32:41 +0000 URL: https://git.openjdk.org/jdk/commit/3da68900818fc43b777098fe6e244779794d5294
16-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/21449 Date: 2024-10-10 11:50:52 +0000
14-10-2024
We don't test KDE, but since the fix is confirmed to work, we can push it to JDK 24.
09-10-2024
This was mentioned here https://mail.openjdk.org/pipermail/client-libs-dev/2024-October/023195.html
09-10-2024
I can confirm that adding the KDE2_WM to the list fixing the issue. ``` --- a/src/java.desktop/unix/classes/sun/awt/X11/XWindowPeer.java +++ b/src/java.desktop/unix/classes/sun/awt/X11/XWindowPeer.java @@ -774,6 +774,7 @@ protected Point getNewLocation(XConfigureEvent xe, int leftInset, int topInset) case XWM.MOTIF_WM: case XWM.METACITY_WM: case XWM.MUTTER_WM: + case XWM.KDE2_WM: case XWM.SAWFISH_WM: case XWM.UNITY_COMPIZ_WM: { ```
26-08-2024