diff --git a/src/core.c b/src/core.c
index 909caa1..d84887f 100644
--- a/src/core.c
+++ b/src/core.c
@@ -96,6 +96,7 @@ static int assign_wallpaper_to_output(chroma_state_t *state,
   bool image_changed = (output->image != image);
   if (image_changed && output->image) {
     chroma_output_invalidate_texture(output);
+    output->vbo_dirty = true; // VBO needs update for new image
     chroma_log("DEBUG", "Image changed for output %u, invalidated texture",
                output->id);
   }
@@ -103,6 +104,11 @@ static int assign_wallpaper_to_output(chroma_state_t *state,
   // Assign image to output
   output->image = image;
 
+  // Mark VBO as dirty if image changed
+  if (image_changed) {
+    output->vbo_dirty = true;
+  }
+
   // Store old configuration values for comparison
   chroma_scale_mode_t old_scale_mode = output->scale_mode;
   chroma_filter_quality_t old_filter_quality = output->filter_quality;
@@ -120,6 +126,7 @@ static int assign_wallpaper_to_output(chroma_state_t *state,
     if (had_config && (old_scale_mode != output->scale_mode ||
                        old_filter_quality != output->filter_quality)) {
       chroma_output_invalidate_texture(output);
+      output->vbo_dirty = true; // VBO needs update for new scale mode
       chroma_log("DEBUG",
                  "Configuration changed for output %u, invalidated texture",
                  output->id);
@@ -273,14 +280,14 @@ int chroma_run(chroma_state_t *state) {
       break;
     }
 
-    // Use select() to wait for events with timeout
+    // Use `select()` to wait for events with longer timeout to reduce CPU usage
     fd_set readfds;
     struct timeval timeout;
 
     FD_ZERO(&readfds);
     FD_SET(fd, &readfds);
 
-    timeout.tv_sec = 1; // 1s timeout
+    timeout.tv_sec = 10;
     timeout.tv_usec = 0;
 
     int select_result = select(fd + 1, &readfds, NULL, NULL, &timeout);