If you set "Shuffle questions" to "No", all questions are displayed on one page regardles of value of "Questions per page".

It's because in the mod/quiz/locallib.php the pagination is called only when 'shufflequestions' flag is on. I see no reason to not call the pagination for non-shuffles quizes too.

Fix:

$ diff -U2 locallib.php.old locallib.php
— locallib.php.old 2008-02-26 16:58:24.000000000 +0300
+++ locallib.php 2008-02-26 16:57:43.000000000 +0300
@@ -65,9 +65,5 @@
$attempt->userid = $USER->id;
$attempt->preview = 0;

• if ($quiz->shufflequestions) { - $attempt->layout = quiz_repaginate($quiz->questions, $quiz->questionsperpage, true); - }

  else

  { - $attempt->layout = $quiz->questions; - }

  + $attempt->layout = quiz_repaginate($quiz->questions, $quiz->questionsperpage, $quiz->shufflequestions);
  }