kms: Don't reschedule rendering on inactive sessions

src/backend/kms/mod.rs

@@ -1004,6 +1004,7 @@ impl KmsState {
                                     &device.render_node,
                                     &mut data.state.common,
                                 ) {
+                                    if backend.session.is_active() {
                                         slog_scope::error!("Error rendering: {}", err);
                                         return TimeoutAction::ToDuration(Duration::from_secs_f64(
                                             1.0 / surface.refresh_rate as f64,
@@ -1011,6 +1012,7 @@ impl KmsState {
                                     }
                                 }
                             }
+                        }
                         TimeoutAction::Drop
                     },
                 )?);