Index: openacs-4/packages/proctoring-support/www/resources/proctoring.js
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/proctoring-support/www/resources/Attic/proctoring.js,v
diff -u -r1.1.2.21 -r1.1.2.22
--- openacs-4/packages/proctoring-support/www/resources/proctoring.js	26 Jun 2023 10:36:44 -0000	1.1.2.21
+++ openacs-4/packages/proctoring-support/www/resources/proctoring.js	10 Jul 2023 14:12:25 -0000	1.1.2.22
@@ -754,17 +754,15 @@
             const ctx = canvas.getContext('2d', {willReadFrequently: true});
             ctx.drawImage(video, 0, 0, iWidth, iHeight);
 
-            // In the future we might be stricter about black pictures...
-            // if (this.isCanvasMonochrome(canvas)) {
-            //     throw 'canvas is monochrome';
-            // }
+            if (this.isCanvasMonochrome(canvas)) {
+                throw 'canvas is monochrome';
+            }
 
-            // Check that camera does not keep sending the same
-            // picture over and over.
-            if (streamName === 'camera' &&
-                prevPicture !== null &&
+            // Check that we are not sending the same picture over and
+            // over.
+            if (prevPicture &&
                 this.areCanvasEquals(canvas, prevPicture)) {
-                throw 'Camera is sending the same identical picture twice.';
+                throw 'you are sending the same identical picture twice.';
             }
             this.prevPictures[i] = this.cloneCanvas(canvas);