diff --git a/SheepShaver/src/BeOS/main_beos.cpp b/SheepShaver/src/BeOS/main_beos.cpp
index 7d654479..967b3c3e 100644
--- a/SheepShaver/src/BeOS/main_beos.cpp
+++ b/SheepShaver/src/BeOS/main_beos.cpp
@@ -1248,6 +1248,7 @@ status_t SheepShaver::tick_func(void *arg)
 
 void TriggerInterrupt(void)
 {
+	idle_resume();
 #if 0
 	WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
 #else
diff --git a/SheepShaver/src/Unix/configure.ac b/SheepShaver/src/Unix/configure.ac
index 5377a93e..f2ab46fb 100644
--- a/SheepShaver/src/Unix/configure.ac
+++ b/SheepShaver/src/Unix/configure.ac
@@ -192,6 +192,7 @@ no:linux*|no:netbsd*)
     ])
   ])
   AC_CHECK_FUNCS(pthread_cancel)
+  AC_CHECK_FUNCS(pthread_cond_init)
   AC_CHECK_FUNCS(pthread_mutexattr_setprotocol)
   AC_CHECK_FUNCS(pthread_mutexattr_settype)
   AC_CHECK_FUNCS(pthread_mutexattr_setpshared)
diff --git a/SheepShaver/src/Unix/main_unix.cpp b/SheepShaver/src/Unix/main_unix.cpp
index b5f03516..41b120f8 100644
--- a/SheepShaver/src/Unix/main_unix.cpp
+++ b/SheepShaver/src/Unix/main_unix.cpp
@@ -1513,8 +1513,10 @@ void B2_delete_mutex(B2_mutex *mutex)
 #if !EMULATED_PPC
 void TriggerInterrupt(void)
 {
-	if (ready_for_signals)
+	if (ready_for_signals) {
+		idle_resume();
 		pthread_kill(emul_thread, SIGUSR2);
+	}
 }
 #endif
 
diff --git a/SheepShaver/src/emul_op.cpp b/SheepShaver/src/emul_op.cpp
index cfb90bc5..ba5de77f 100644
--- a/SheepShaver/src/emul_op.cpp
+++ b/SheepShaver/src/emul_op.cpp
@@ -463,14 +463,14 @@ void EmulOp(M68kRegisters *r, uint32 pc, int selector)
 		case OP_IDLE_TIME:
 			// Sleep if no events pending
 			if (ReadMacInt32(0x14c) == 0)
-				Delay_usec(16667);
+				idle_wait();
 			r->a[0] = ReadMacInt32(0x2b6);
 			break;
 
 		case OP_IDLE_TIME_2:
 			// Sleep if no events pending
 			if (ReadMacInt32(0x14c) == 0)
-				Delay_usec(16667);
+				idle_wait();
 			r->d[0] = (uint32)-2;
 			break;
 
diff --git a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
index 0ed289c9..7fdd71ea 100644
--- a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
+++ b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
@@ -915,6 +915,7 @@ void emul_ppc(uint32 entry)
 
 void TriggerInterrupt(void)
 {
+	idle_resume();
 #if 0
   WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
 #else