diff --git a/src/apps/homescreen/layout_homescreen.py b/src/apps/homescreen/layout_homescreen.py
index 1c23436661..93097e8464 100644
--- a/src/apps/homescreen/layout_homescreen.py
+++ b/src/apps/homescreen/layout_homescreen.py
@@ -1,3 +1,5 @@
+import utime
+
 from trezor import ui
 from trezor import loop
 from trezor import layout
@@ -6,8 +8,8 @@ from trezor import utils
 def layout_homescreen():
     print("Homescreen layout!")
 
-    from apps import playground
-    loop.call_later(5 * 1000000, layout.change(playground.layout_tap_to_confirm('1BitkeyP2nDd5oa64x7AjvBbbwST54W5Zmx2', 110.126967, 'BTC')))
+    # from apps import playground
+    # loop.call_at(utime.ticks_us() + 5 * 1000000, layout.change(playground.layout_tap_to_confirm('1BitkeyP2nDd5oa64x7AjvBbbwST54W5Zmx2', 110.126967, 'BTC')))
 
     ui.display.bar(0, 0, 240, 240, ui.WHITE)
 
diff --git a/src/trezor/loop.py b/src/trezor/loop.py
index 3321375365..22dd88427d 100644
--- a/src/trezor/loop.py
+++ b/src/trezor/loop.py
@@ -18,10 +18,51 @@ evt_handlers = { EVT_TSTART: None,
                  EVT_MSG: None, }
 time_queue = []
 
+if __debug__:
+    # For performance stats
+    import array
+    log_delay_pos = 0
+    log_delay_rb_len = const(10)
+    log_delay_rb = array.array('i', [0] * log_delay_rb_len)
 
-def run_forever():
+
+def __wait_for_event(timeout_us):
+    if __debug__:
+        # Adding delay to ring buffer for performance stats
+        global log_delay_pos
+        global log_delay_rb
+        global log_delay_rb_len
+        log_delay_rb[log_delay_pos] = timeout_us
+        log_delay_pos = (log_delay_pos + 1) % log_delay_rb_len
+
+    event = msg.select(timeout_us)
+    if event:
+        # print('msg:', m)
+        # utime.sleep_us(10000)
+        if event[0] == 2:
+            ui.display.bar(event[1], event[2], 2, 2, ui.BLACK)
+    return event
+
+
+def __call_at(time, gen, *args):
+    if __debug__:
+        log.debug("Scheduling %s", (time, gen, args))
+
+    if not time:
+        time = utime.ticks_us()
+    heappush(time_queue, (time, gen, args))
+
+
+def sleep(us):
+    return utime.ticks_us() + us
+
+
+def run_forever(start_gens):
     delay_max = const(1000000)
 
+    for gen in start_gens:
+        __call_at(None, gen)
+
     while True:
 
         if time_queue:
@@ -30,7 +71,7 @@ def run_forever():
         else:
             delay = delay_max
 
-        event = wait_for_event(delay)
+        event = __wait_for_event(delay)
 
         if event:
             # run interrupt handler
@@ -49,52 +90,17 @@ def run_forever():
 
         if isinstance(ret, type_gen):
             # generator, run it and call us asap
-            call_at(None, ret)
-            call_at(None, gen, *args)
+            __call_at(None, ret)
+            __call_at(None, gen, *args)
 
         elif isinstance(ret, int):
             if ret >= 0:
-                # sleep in microseconds, call us later
-                call_at(utime.ticks_us() + ret, gen, *args)
+                # sleep until ret, call us later
+                __call_at(ret, gen, *args)
             else:
                 # wait for event
                 raise NotImplementedError()
 
         elif ret is None:
             # just call us asap
-            call_at(None, gen, *args)
-
-
-def call_at(time, gen, *args):
-    if __debug__:
-        log.debug("Scheduling %s", (time, gen, args))
-
-    if not time:
-        time = utime.ticks_us()
-    heappush(time_queue, (time, gen, args))
-
-
-if __debug__:
-    # For performance stats
-    import array
-    log_delay_pos = 0
-    log_delay_rb_len = const(10)
-    log_delay_rb = array.array('i', [0] * log_delay_rb_len)
-
-
-def wait_for_event(timeout_us):
-    if __debug__:
-        # Adding delay to ring buffer for performance stats
-        global log_delay_pos
-        global log_delay_rb
-        global log_delay_rb_len
-        log_delay_rb[log_delay_pos] = timeout_us
-        log_delay_pos = (log_delay_pos + 1) % log_delay_rb_len
-
-    event = msg.select(timeout_us)
-    if event:
-        # print('msg:', m)
-        # utime.sleep_us(10000)
-        if event[0] == 2:
-            ui.display.bar(event[1], event[2], 2, 2, ui.BLACK)
-    return event
+            __call_at(None, gen, *args)
diff --git a/src/trezor/main.py b/src/trezor/main.py
index a1b08af42f..fb674af188 100644
--- a/src/trezor/main.py
+++ b/src/trezor/main.py
@@ -2,13 +2,17 @@ import sys
 sys.path.append('lib')
 
 import gc
+import log
+
+log.level = log.INFO
 
 from trezor import loop
 from trezor import layout
 
+
 def perf_info_debug():
     while True:
-        queue = [str(x[2]).split("'")[1] for x in loop.q]
+        queue = [str(x[1]).split("'")[1] for x in loop.time_queue]
 
         delay_avg = sum(loop.log_delay_rb) / loop.log_delay_rb_len
         delay_last = loop.log_delay_rb[loop.log_delay_pos]
@@ -18,21 +22,23 @@ def perf_info_debug():
         print("mem_alloc: %s/%s, delay_avg: %d, delay_last: %d, queue: %s" % \
               (mem_alloc, gc.mem_alloc(), delay_avg, delay_last, ', '.join(queue)))
 
-        yield loop.Sleep(1000000)
+        yield loop.sleep(1000000)
+
 
 def perf_info():
     while True:
         gc.collect()
         print("mem_alloc: %d" % gc.mem_alloc())
-        yield loop.Sleep(1000000)
+        yield loop.sleep(1000000)
+
 
 def run(main_layout):
     if __debug__:
-        loop.call_soon(perf_info_debug())
+        perf_info_gen = perf_info_debug()
     else:
-        loop.call_soon(perf_info())
+        perf_info_gen = perf_info()
 
-    loop.call_soon(layout.set_main(main_layout))
-
-    loop.run_forever()
-    loop.close()
+    loop.run_forever([
+        perf_info_gen,
+        layout.set_main(main_layout),
+    ])
diff --git a/src/trezor/ui.py b/src/trezor/ui.py
index 88e3faf748..2a2aeed9e7 100644
--- a/src/trezor/ui.py
+++ b/src/trezor/ui.py
@@ -53,4 +53,4 @@ def animate_pulse(func, ca, cb, speed=200000, delay=30000):
         y = 0.5 + 0.5 * math.sin(utime.ticks_us() / speed)
         c = blend(ca, cb, y)
         func(c)
-        yield loop.Sleep(delay)
+        yield loop.sleep(delay)