lockSurface: set eglSwapInterval to 0 (#1015)

PointerDilemma · tmbull · web-flow · commit 98fb0212164e · 2026-05-14T14:28:14.000Z
Co-authored-by: tmbull &lt;tristan.m.bull@gmail.com&gt;
diff --git a/src/core/LockSurface.cpp b/src/core/LockSurface.cpp
@@ -105,6 +105,11 @@ void CSessionLockSurface::configure(const Vector2D& size_, uint32_t serial_) {
             readyForFrame = false;
             return;
         }
+
+        // When wayland frame callbacks are used directly, eglSwapInterval should be 0,
+        // otherwise eglSwapBuffers may block under some circumstances.
+        g_pEGL->makeCurrent(eglSurface);
+        eglSwapInterval(g_pEGL->eglDisplay, 0);
     }
 
     if (readyForFrame && !(SAMESIZE && SAMESCALE)) {

Original file line number	Diff line number	Diff line change
`@@ -105,6 +105,11 @@ void CSessionLockSurface::configure(const Vector2D& size_, uint32_t serial_) {`
`105`	`105`	`readyForFrame = false;`
`106`	`106`	`return;`
`107`	`107`	`}`
	`108`	`+`
	`109`	`+ // When wayland frame callbacks are used directly, eglSwapInterval should be 0,`
	`110`	`+ // otherwise eglSwapBuffers may block under some circumstances.`
	`111`	`+ g_pEGL->makeCurrent(eglSurface);`
	`112`	`+ eglSwapInterval(g_pEGL->eglDisplay, 0);`
`108`	`113`	`}`
`109`	`114`
`110`	`115`	`if (readyForFrame && !(SAMESIZE && SAMESCALE)) {`