diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 2f30092e1d36..1913912a9086 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -93,6 +93,7 @@ struct acpi_interface {
 
 /* Global mutex for locking access to the ACPI subsystem. */
 struct mtx	acpi_mutex;
+struct callout	acpi_sleep_timer;
 
 /* Bitmap of device quirks. */
 int		acpi_quirks;
@@ -683,7 +684,9 @@ acpi_attach(device_t dev)
 	    AcpiFormatException(status));
 
     /* Allow sleep request after a while. */
-    timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
+    callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0);
+    callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
+	acpi_sleep_enable, sc);
 
     error = 0;
 
@@ -2490,8 +2493,8 @@ acpi_sleep_force(void *arg)
     device_printf(sc->acpi_dev,
 	"suspend request timed out, forcing sleep now\n");
     /*
-     * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND().
-     * Suspend from acpi_task thread in stead.
+     * XXX Suspending from callout causes freezes in DEVICE_SUSPEND().
+     * Suspend from acpi_task thread instead.
      */
     if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
 	acpi_sleep_force_task, sc)))
@@ -2643,15 +2646,15 @@ acpi_sleep_enable(void *arg)
 {
     struct acpi_softc	*sc = (struct acpi_softc *)arg;
 
+    ACPI_LOCK_ASSERT(acpi);
+
     /* Reschedule if the system is not fully up and running. */
     if (!AcpiGbl_SystemAwakeAndRunning) {
-	timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
+	callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
 	return;
     }
 
-    ACPI_LOCK(acpi);
     sc->acpi_sleep_disabled = FALSE;
-    ACPI_UNLOCK(acpi);
 }
 
 static ACPI_STATUS
@@ -2866,7 +2869,7 @@ acpi_EnterSleepState(struct acpi_softc *sc, int state)
     EVENTHANDLER_INVOKE(power_resume);
 
     /* Allow another sleep request after a while. */
-    timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
+    callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
 
     /* Run /etc/rc.resume after we are back. */
     if (devctl_process_running())
diff --git a/sys/dev/atkbdc/atkbd.c b/sys/dev/atkbdc/atkbd.c
index 199fcb1ed696..0d2b44ba5182 100644
--- a/sys/dev/atkbdc/atkbd.c
+++ b/sys/dev/atkbdc/atkbd.c
@@ -62,7 +62,20 @@ __FBSDID("$FreeBSD$");
 #include <dev/atkbdc/atkbdreg.h>
 #include <dev/atkbdc/atkbdcreg.h>
 
-static timeout_t	atkbd_timeout;
+typedef struct atkbd_state {
+	KBDC		kbdc;		/* keyboard controller */
+	int		ks_mode;	/* input mode (K_XLATE,K_RAW,K_CODE) */
+	int		ks_flags;	/* flags */
+#define COMPOSE		(1 << 0)
+	int		ks_polling;
+	int		ks_state;	/* shift/lock key state */
+	int		ks_accents;	/* accent key index (> 0) */
+	u_int		ks_composed_char; /* composed char code (> 0) */
+	u_char		ks_prefix;	/* AT scan code prefix */
+	struct callout	ks_timer;
+} atkbd_state_t;
+
+static void		atkbd_timeout(void *arg);
 static void		atkbd_shutdown_final(void *v);
 
 int
@@ -88,6 +101,7 @@ int
 atkbd_attach_unit(device_t dev, keyboard_t **kbd, int irq, int flags)
 {
 	keyboard_switch_t *sw;
+	atkbd_state_t *state;
 	int args[2];
 	int error;
 	int unit;
@@ -120,6 +134,8 @@ atkbd_attach_unit(device_t dev, keyboard_t **kbd, int irq, int flags)
 	 * This is a kludge to compensate for lost keyboard interrupts.
 	 * A similar code used to be in syscons. See below. XXX
 	 */
+	state = (atkbd_state_t *)(*kbd)->kb_data;
+	callout_init(&state->ks_timer, 0);
 	atkbd_timeout(*kbd);
 
 	if (bootverbose)
@@ -134,6 +150,7 @@ atkbd_attach_unit(device_t dev, keyboard_t **kbd, int irq, int flags)
 static void
 atkbd_timeout(void *arg)
 {
+	atkbd_state_t *state;
 	keyboard_t *kbd;
 	int s;
 
@@ -175,25 +192,14 @@ atkbd_timeout(void *arg)
 			kbdd_intr(kbd, NULL);
 	}
 	splx(s);
-	timeout(atkbd_timeout, arg, hz/10);
+	state = (atkbd_state_t *)kbd->kb_data;
+	callout_reset(&state->ks_timer, hz / 10, atkbd_timeout, arg);
 }
 
 /* LOW-LEVEL */
 
 #define ATKBD_DEFAULT	0
 
-typedef struct atkbd_state {
-	KBDC		kbdc;		/* keyboard controller */
-	int		ks_mode;	/* input mode (K_XLATE,K_RAW,K_CODE) */
-	int		ks_flags;	/* flags */
-#define COMPOSE		(1 << 0)
-	int		ks_polling;
-	int		ks_state;	/* shift/lock key state */
-	int		ks_accents;	/* accent key index (> 0) */
-	u_int		ks_composed_char; /* composed char code (> 0) */
-	u_char		ks_prefix;	/* AT scan code prefix */
-} atkbd_state_t;
-
 /* keyboard driver declaration */
 static int		atkbd_configure(int flags);
 static kbd_probe_t	atkbd_probe;
@@ -470,7 +476,10 @@ atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
 static int
 atkbd_term(keyboard_t *kbd)
 {
+	atkbd_state_t *state = (atkbd_state_t *)kbd->kb_data;
+
 	kbd_unregister(kbd);
+	callout_drain(&state->ks_timer);
 	return 0;
 }
 
diff --git a/sys/kern/kern_cons.c b/sys/kern/kern_cons.c
index da157ecccfa9..a6ccf626803d 100644
--- a/sys/kern/kern_cons.c
+++ b/sys/kern/kern_cons.c
@@ -607,6 +607,7 @@ SYSINIT(cndev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, cn_drvinit, NULL);
 #ifdef HAS_TIMER_SPKR
 
 static int beeping;
+static struct callout beeping_timer;
 
 static void
 sysbeepstop(void *chan)
@@ -629,11 +630,18 @@ sysbeep(int pitch, int period)
 	timer_spkr_setfreq(pitch);
 	if (!beeping) {
 		beeping = period;
-		timeout(sysbeepstop, (void *)NULL, period);
+		callout_reset(&beeping_timer, period, sysbeepstop, NULL);
 	}
 	return (0);
 }
 
+static void
+sysbeep_init(void *unused)
+{
+
+	callout_init(&beeping_timer, CALLOUT_MPSAFE);
+}
+SYSINIT(sysbeep, SI_SUB_SOFTINTR, SI_ORDER_ANY, sysbeep_init, NULL);
 #else
 
 /*