Index: /trunk/src/VBox/Main/src-server/MachineImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/MachineImpl.cpp	(revision 54926)
+++ /trunk/src/VBox/Main/src-server/MachineImpl.cpp	(revision 54927)
@@ -1302,6 +1302,6 @@
                         *aParavirtProvider = ParavirtProvider_HyperV;
                     }
-                    else if (   mUserData->s.strOsType == "Linux26"
-                             || mUserData->s.strOsType == "Linux26_64"
+                    else if (   mUserData->s.strOsType == "Linux26"      // Linux22 and Linux24 omitted as they're too old
+                             || mUserData->s.strOsType == "Linux26_64"   // for having any KVM paravirtualization support.
                              || mUserData->s.strOsType == "Linux"
                              || mUserData->s.strOsType == "Linux_64"