diff --git a/src/rhd_pm.c b/src/rhd_pm.c
index 5fea157..d341bd9 100644
--- a/src/rhd_pm.c
+++ b/src/rhd_pm.c
@@ -84,7 +84,9 @@ RHDPmSetClock(RHDPtr rhdPtr)
 
     RHDFUNC(Pm);
 
+    system("rhd_dump -r 0000,7FFF 01:00.0 > /var/log/pm.before.txt");
     RHDSetEngineClock(rhdPtr, Pm->ForcedEngineClock);
+    system("rhd_dump -r 0000,7FFF 01:00.0 > /var/log/pm.after.txt");
 
     /* Induce logging of new engine clock */
     RHDGetEngineClock(rhdPtr);