diff --git a/servers/pm/timers.c b/servers/pm/timers.c
new file mode 100644
index 000000000..c052b2909
--- /dev/null
+++ b/servers/pm/timers.c
@@ -0,0 +1,77 @@
+/* PM watchdog timer management. 
+ */
+
+#include "pm.h"
+
+#define VERBOSE 0
+
+#include <timers.h>
+#include <minix/syslib.h>
+#include <minix/com.h>
+
+PRIVATE timer_t *pm_timers = NULL;
+
+PUBLIC void pm_set_timer(timer_t *tp, int ticks, tmr_func_t watchdog, int arg)
+{
+	int r;
+	clock_t now, old_head = 0, new_head;
+
+	if((r = getuptime(&now)) != OK)
+		panic(__FILE__, "PM couldn't get uptime from system task.", NO_NUM);
+
+	tmr_inittimer(tp);
+	tmr_arg(tp)->ta_int = arg;
+
+	old_head = tmrs_settimer(&pm_timers, tp, now+ticks, watchdog, &new_head);
+
+	/* reschedule our synchronous alarm if necessary */
+	if(! old_head || old_head > new_head) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "PM set timer couldn't set synchronous alarm.", NO_NUM);
+#if VERBOSE
+		else
+			printf("timers: after setting, set synalarm to %d -> %d\n", old_head, new_head);
+#endif
+	}
+
+	return;
+}
+
+PUBLIC void pm_expire_timers(clock_t now)
+{
+	clock_t new_head;
+	tmrs_exptimers(&pm_timers, now, &new_head);
+	if(new_head > 0) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "PM expire timer couldn't set synchronous alarm.", NO_NUM);
+#if VERBOSE
+		else
+			printf("timers: after expiry, set synalarm to %d\n", new_head);
+#endif
+	}
+#if VERBOSE
+	else printf("after expiry, no new timer set\n");
+#endif
+}
+
+PUBLIC void pm_cancel_timer(timer_t *tp)
+{
+	clock_t new_head, old_head;
+	old_head = tmrs_clrtimer(&pm_timers, tp, &new_head);
+
+	/* if the earliest timer has been removed, we have to set
+	 * the synalarm to the next timer, or cancel the synalarm
+	 * altogether if th last time has been cancelled (new_head
+	 * will be 0 then).
+	 */
+	if(old_head < new_head || ! new_head) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "PM expire timer couldn't set synchronous alarm.", NO_NUM);
+#if VERBOSE
+		printf("timers: after cancelling, set synalarm to %d -> %d\n", old_head, new_head);
+#endif
+	}
+#if VERBOSE
+	else printf("timers: after cancelling no new timer\n");
+#endif
+}