diff -Nru virtualbox-4.3.30-dfsg/debian/changelog virtualbox-4.3.30-dfsg/debian/changelog
--- virtualbox-4.3.30-dfsg/debian/changelog	2015-08-28 13:40:24.000000000 +0200
+++ virtualbox-4.3.30-dfsg/debian/changelog	2015-09-21 11:01:13.000000000 +0200
@@ -1,3 +1,13 @@
+virtualbox (4.3.30-dfsg-1+deb8u2) jessie; urgency=medium
+
+  [ Ritesh Raj Sarraf ]
+  * Demote virtualbox-dkms | virtualbox-source to pre-depends,
+    needed to fully configure virtualbox kernel module prior
+    to reload virtualbox service, avoiding a race condition.
+    (Closes: #798527, #798979)
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Fri, 18 Sep 2015 23:35:08 +0200
+
 virtualbox (4.3.30-dfsg-1+deb8u1) jessie-security; urgency=medium
 
   [ Ritesh Raj Sarraf ]
diff -Nru virtualbox-4.3.30-dfsg/debian/control virtualbox-4.3.30-dfsg/debian/control
--- virtualbox-4.3.30-dfsg/debian/control	2015-07-14 19:22:19.000000000 +0200
+++ virtualbox-4.3.30-dfsg/debian/control	2015-09-21 11:00:43.000000000 +0200
@@ -87,11 +87,9 @@
 
 Package: virtualbox
 Architecture: amd64 i386
-Pre-Depends: dpkg (>= 1.15.6~)
+Pre-Depends: dpkg (>= 1.15.6~), virtualbox-dkms (= ${source:Version}) | virtualbox-source (= ${source:Version})
 Depends: adduser, ${misc:Depends}, ${python:Depends}, ${shlibs:Depends}
-Recommends: virtualbox-dkms (= ${source:Version}) | virtualbox-source (= ${source:Version}),
-            virtualbox-qt (= ${binary:Version}),
-            ${shlibs:Recommends}
+Recommends: virtualbox-qt (= ${binary:Version}), ${shlibs:Recommends}
 Suggests: vde2, virtualbox-guest-additions-iso
 Conflicts: virtualbox-2.0,
            virtualbox-2.1,
@@ -132,7 +130,8 @@
 Section: contrib/kernel
 Architecture: all
 Pre-Depends: dpkg (>= 1.15.6~)
-Depends: virtualbox (>= ${source:Version}), ${misc:Depends}
+Depends: ${misc:Depends}
+Recommends: virtualbox (>= ${source:Version})
 Description: x86 virtualization solution - kernel module sources for dkms
  VirtualBox is a free x86 virtualization solution allowing a wide range
  of x86 operating systems such as Windows, DOS, BSD or Linux to run on a