Bug 2268149

Summary:	Alt-tabbing into a Java Xwayland window breaks keyboard input
Product:	[Fedora] Fedora	Reporter:	Ondřej Budai <obudai>
Component:	mutter	Assignee:	GNOME SIG Unassigned <gnome-sig>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	40	CC:	fmuellner, gnome-sig, jadahl, kparal, otaylor, philip.wyett, robatino, tpopela, walters
Target Milestone:	---	Keywords:	Desktop
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	mutter-46.0-1.fc40	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2024-03-20 19:56:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2187794

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.