Forward Wayland modifier events to wlroots seat when nested#2273
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Forward Wayland modifier events to wlroots seat when nested#2273bjornmp wants to merge 1 commit into
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When running nested on a Wayland compositor, gamescope received wl_keyboard.modifiers from the host but only stored them locally. Key events were injected through a virtual keyboard with no modifier state, so Xwayland clients saw key presses with state 0x0. Forward modifier updates to the keyboard group and inject keys through that keyboard so the seat reports correct Shift/Ctrl/Alt state. Fixes ValveSoftware#1740 Fixes ValveSoftware#2032 Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
When gamescope runs nested on a Wayland compositor, it receives
wl_keyboard.modifiersfrom the host compositor but previously only stored them locally. Key events were injected via a stub virtual keyboard with no modifier state, so clients (especially Xwayland apps) received key presses with modifier state0x0.This change forwards modifier events to the wlroots
keyboard_groupand injects keys through that keyboard, so the seat reports correct Shift/Ctrl/Alt state.Fixes #1740
Fixes #2032
Root cause
Discussed in #1740: older Xwayland versions ran their own XKB state machine and masked this bug. Xwayland 24.1.5+ correctly expects the compositor to forward modifier state (xserver MR 1758), which exposed the issue in gamescope.
Test plan
gamescope -- konsole— Shift+letters produce capitalsEnvironment
976f7fc) with this patchMade with Cursor