diff --git a/packages/modules/common/store/_io.py b/packages/modules/common/store/_io.py
index 7872e64275..cba0fcccc9 100644
--- a/packages/modules/common/store/_io.py
+++ b/packages/modules/common/store/_io.py
@@ -8,6 +8,7 @@
 class IoValueStoreBroker(ValueStore[IoState]):
     def __init__(self, num: int) -> None:
         self.num = num
+        self.state = IoState()
 
     def set(self, state: IoState) -> None:
         self.state = state
diff --git a/packages/modules/io_devices/dimm_kit/api.py b/packages/modules/io_devices/dimm_kit/api.py
index 8f87420749..7e953dd08d 100644
--- a/packages/modules/io_devices/dimm_kit/api.py
+++ b/packages/modules/io_devices/dimm_kit/api.py
@@ -52,9 +52,10 @@ def read():
                     pin.value, 1, unit=config.configuration.modbus_id
                 ) for pin in DigitalOutputMapping})
 
-    def write(analog_output: Optional[Dict[str, int]], digital_output: Optional[Dict[str, int]]) -> None:
+    def write(analog_output: Optional[Dict[str, int]], digital_output: Optional[Dict[str, bool]]) -> None:
         for i, value in digital_output.items():
-            client.write_single_coil(DigitalOutputMapping[i].value, value, unit=config.configuration.modbus_id)
+            client.write_single_coil(DigitalOutputMapping[i].value, 1 if value is True else 0,
+                                     unit=config.configuration.modbus_id)
 
     version = False
     client = ModbusTcpClient_(config.configuration.host, config.configuration.port)
diff --git a/runs/atreboot.sh b/runs/atreboot.sh
index bc71f8d14a..0d33db394b 100755
--- a/runs/atreboot.sh
+++ b/runs/atreboot.sh
@@ -137,7 +137,7 @@ chmod 666 "$LOGFILE"
 	# check group membership
 	echo "Group membership..."
 	# ToDo: remove sudo group membership if possible
-	for group in "input" "dialout" "gpio" "sudo"; do
+	for group in "input" "dialout" "gpio" "sudo" "video"; do
 		if ! groups openwb | grep --quiet "$group"; then
 			if getent group | cut -d: -f1 | grep --quiet "$group"; then
 				sudo usermod -G "$group" -a openwb