=== modified file 'debian/changelog'
--- debian/changelog	2010-06-30 10:39:38 +0000
+++ debian/changelog	2010-06-30 10:40:39 +0000
@@ -2,6 +2,10 @@
 
   * Update harmfully incorrect German translation of menu legend, which
     omitted mention of pressing Ctrl-x to boot (LP: #580178).
+  * Rearrange postinst install_devices logic so that preparatory code is run
+    only once and the while loop only encloses actual asking of questions,
+    and so that the question being asked is always marked for redisplay when
+    going round the while loop again (LP: #580408).
 
  -- Colin Watson <cjwatson@ubuntu.com>  Wed, 30 Jun 2010 11:37:43 +0100
 

=== modified file 'debian/postinst.in'
--- debian/postinst.in	2010-04-28 14:43:01 +0000
+++ debian/postinst.in	2010-06-30 10:40:39 +0000
@@ -219,7 +219,6 @@
             touch /boot/grub/grub.cfg
           fi
         else
-          while :; do
             question=grub-pc/install_devices
             device_map="$(grub-mkdevicemap -m - | grep -v '^(fd[0-9]\+)' || true)"
             devices="$(echo "$device_map" | cut -f2)"
@@ -295,6 +294,7 @@
               fi
             fi
 
+          while :; do
             ids=
             descriptions=
             for device in $devices; do
@@ -342,6 +342,7 @@
                 if [ "$RET" = true ]; then
                   break
                 else
+                  db_fset "$question" seen false
                   db_fset grub-pc/install_devices_failed seen false
                   continue
                 fi
@@ -358,6 +359,7 @@
                 if [ "$RET" = true ]; then
                   break
                 else
+                  db_fset "$question" seen false
                   db_fset grub-pc/install_devices_empty seen false
                 fi
               else