The #25265 change introduced an artificial restriction that is actually unnecessary and harmful:
https://github.com/openjdk/jdk/blob/f5e4cd7f0d12fd21399b192b32a5c9abfe8a3564/src/java.desktop/unix/classes/sun/awt/X11/XToolkit.java#L1526-L1529 > Trying to click any mouse additional button raises an exception like the > following: > > WARN - sun.awt.X11.XToolkit - Exception on Toolkit thread java.lang.IllegalArgumentException: Nonexistent button 6 at java.desktop/java.awt.event.MouseEvent.<init>(MouseEvent.java:774) at java.desktop/sun.awt.X11.XWindow.handleButtonPressRelease(XWindow.java:765) at java.desktop/sun.awt.X11.XContentWindow.handleButtonPressRelease(XContentWindow.java:45) at java.desktop/sun.awt.X11.XBaseWindow.dispatchEvent(XBaseWindow.java:1206) at java.desktop/sun.awt.X11.XBaseWindow.dispatchToWindow(XBaseWindow.java:1178) at java.desktop/sun.awt.X11.XToolkit.dispatchEvent(XToolkit.java:939) at java.desktop/sun.awt.X11.XToolkit.run(XToolkit.java:1086) at java.desktop/sun.awt.X11.XToolkit.run(XToolkit.java:968) at java.base/java.lang.Thread.run(Thread.java:1583) This changeset simply reverses the check, returning it to its original state. The actual check for the supported mouse buttons for the robot is maintained here. https://github.com/openjdk/jdk/blob/f5e4cd7f0d12fd21399b192b32a5c9abfe8a3564/src/java.desktop/share/classes/java/awt/Robot.java#L367-L371 https://github.com/openjdk/jdk/blob/f5e4cd7f0d12fd21399b192b32a5c9abfe8a3564/src/java.desktop/share/classes/java/awt/Robot.java#L208-L214 ------------- Commit messages: - 8372756: Mouse additional buttons and horizontal scrolling are broken on XWayland GNOME >= 47 after JDK-835190 Changes: https://git.openjdk.org/jdk/pull/28621/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28621&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8372756 Stats: 23 lines in 1 file changed: 7 ins; 14 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/28621.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28621/head:pull/28621 PR: https://git.openjdk.org/jdk/pull/28621
