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Bug 2268149 - Alt-tabbing into a Java Xwayland window breaks keyboard input
Summary: Alt-tabbing into a Java Xwayland window breaks keyboard input
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: mutter
Version: 40
Hardware: Unspecified
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: GNOME SIG Unassigned
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F40FinalBlocker, FinalBlocker
TreeView+ depends on / blocked
 
Reported: 2024-03-06 12:14 UTC by Ondřej Budai
Modified: 2024-03-20 19:56 UTC (History)
9 users (show)

Fixed In Version: mutter-46.0-1.fc40
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2024-03-20 19:56:11 UTC
Type: ---
Embargoed:

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System ID Private Priority Status Summary Last Updated
GNOME Gitlab GNOME mutter issues 3328 0 None closed Keyboard input focus broken for globally active Xwayland windows 2024-03-11 12:34:27 UTC

Description Ondřej Budai 2024-03-06 12:14:43 UTC 
Tested with mutter-46~rc-1.fc40.x86_64

When alt-tabbing from a wayland window to a Java xwayland window, I cannot send any keyboard input to the Java window. When I type, the input simply goes into the previous wayland window (e.g. firefox, or tilix).

This bug appears when using any of the JetBrains IDEs (Java-based), or even when using a simple Java application taken from https://www.codejava.net/java-se/swing/jtextfield-basic-tutorial-and-examples. Both applications work fine on Fedora 39.

This is already reported upstream here: https://gitlab.gnome.org/GNOME/mutter/-/issues/3328

Reproducible: Always

Steps to Reproduce:
1. Use Firefox
2. Switch to a Java-app (e.g. PyCharm)
3. Type something
Actual Results:  
The keystrokes are sent to Firefox.

Expected Results:  
The keystrokes are sent to the Java app.
Comment 1 Fedora Blocker Bugs Application 2024-03-06 12:15:53 UTC 
Proposed as a Blocker for 40-final by Fedora user obudai using the blocker tracking app because:

 This bug affects all Java applications and basically makes them usable. Thus, I strongly believe that this violates the Window manager functionality release criterium.
Comment 2 Ondřej Budai 2024-03-11 09:24:36 UTC 
According to other reports, this also breaks many Wine apps.

There's now an upstream patch: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3651

I built a COPR repository with it, and it fixed my issue: https://copr.fedorainfracloud.org/coprs/obudai/mutter-pr-3651/

I asked upstream if this gets included in the final mutter 46 release. If it doesn't, I will propose a downstream patch in Fedora.
Comment 3 Kamil Páral 2024-03-11 12:42:34 UTC 
I can confirm this issue with CardManager (first java app I found) from Fedora repos. The same mutter version.
Comment 4 Tomas Popela 2024-03-12 14:30:20 UTC 
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3651 was merged upstream.
Comment 5 Fedora Update System 2024-03-18 16:26:31 UTC 
FEDORA-2024-1ed0b13d87 (gnome-shell-46.0-1.fc40, gnome-shell-extensions-46.0-1.fc40, and 1 more) has been submitted as an update to Fedora 40.
https://bodhi.fedoraproject.org/updates/FEDORA-2024-1ed0b13d87
Comment 6 Kamil Páral 2024-03-19 11:38:03 UTC 
(In reply to Fedora Update System from comment #5)
> FEDORA-2024-1ed0b13d87 (gnome-shell-46.0-1.fc40,
> gnome-shell-extensions-46.0-1.fc40, and 1 more) has been submitted as an
> update to Fedora 40.
> https://bodhi.fedoraproject.org/updates/FEDORA-2024-1ed0b13d87

With this update, I see no further issue with CardManager.
Comment 7 Fedora Update System 2024-03-20 19:56:11 UTC 
FEDORA-2024-1ed0b13d87 (gnome-shell-46.0-1.fc40, gnome-shell-extensions-46.0-1.fc40, and 1 more) has been pushed to the Fedora 40 stable repository.
If problem still persists, please make note of it in this bug report.
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