2 files changed, 9 insertions, 1 deletions

diff --git a/usr.bin/lock/lock.1 b/usr.bin/lock/lock.1
index c162c29124b4..adfea5c586c3 100644
--- a/usr.bin/lock/lock.1
+++ b/usr.bin/lock/lock.1
@@ -70,10 +70,14 @@ This option is implemented in a way similar to the
 .Fl S
 option of
 .Xr vidcontrol 1 ,
-and is only available if the terminal in question is a
+and thus has the same restrictions.
+It is only available if the terminal in question is a
 .Xr syscons 4
 virtual terminal.
 .El
+.Sh SEE ALSO
+.Xr vidcontrol 1 ,
+.Xr syscons 4
 .Sh HISTORY
 The
 .Nm
diff --git a/usr.sbin/vidcontrol/vidcontrol.1 b/usr.sbin/vidcontrol/vidcontrol.1
index edde901005a8..63252c0bdad4 100644
--- a/usr.sbin/vidcontrol/vidcontrol.1
+++ b/usr.sbin/vidcontrol/vidcontrol.1
@@ -228,6 +228,10 @@ Turn vty switching on or off.
 When vty switching is off,
 attempts to switch to a different virtual terminal will fail.
 (The default is to permit vty switching.)
+This protection can be easily bypassed when the kernel is compiled with
+the DDB option.
+However, you probably shouldn't compile the kernel debugger on a box which
+is supposed to be physically secure.
 .It Fl s Ar number
 Set the current vty to
 .Ar number .