diff --git a/README.md b/README.md
index 9e3c621..0d3b147 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ add/change "console=tty3 quiet" to /boot/cmdline.txt
 
 copy everything to /opt/freezer/
 chmod a+x /opt/freezer/display.py
-add to /etc/rc.local: python3 /opt/freezer/display.py
+add to /etc/rc.local: nohup python3 /opt/freezer/display.py &
 
 ### read-only root
     wget https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/read-only-fs.sh
diff --git a/raspberry-environment/display.py b/raspberry-environment/display.py
index d5de780..e2605e4 100644
--- a/raspberry-environment/display.py
+++ b/raspberry-environment/display.py
@@ -132,6 +132,8 @@ if __name__ == '__main__':
   GPIO.output(18, GPIO.LOW)
   GPIO.output(23, GPIO.LOW)
 
+  g="/sys/kernel/config/usb_gadget/freezer/"
+
   try:
     subprocess.run(['dd', 'if=/dev/zero', 'of=/tmp/usbdisk.img', 'bs=1M', 'count=96'], shell=False, check=True)
     #sfdisk
@@ -146,7 +148,7 @@ if __name__ == '__main__':
     # http://irq5.io/2016/12/22/raspberry-pi-zero-as-multiple-usb-gadgets/
     # http://isticktoit.net/?p=1383
     subprocess.run(['modprobe', 'libcomposite'], shell=False, check=True)
-    g="/sys/kernel/config/usb_gadget/freezer/"
+
     subprocess.run(['mkdir', g], shell=False, check=True)
 
     os_echo(g+"idVendor", "0x1d6b")  # Linux Foundation
@@ -158,7 +160,7 @@ if __name__ == '__main__':
     os_echo(g+"bDeviceSubClass", "0x02") # correct bus driver
     os_echo(g+"bDeviceProtocol", "0x01") # for multi function
 
-    subprocess.run(['mkdir', g+"strings/0x409"], shell=False, check=True)
+    subprocess.run(['mkdir', g+"strings/0x409"], shell=False, check=True) # english
     os_echo(g+"strings/0x409/serialnumber", "34812ee8aa112377") # random
     os_echo(g+"strings/0x409/manufacturer", "IUL TU Dortmund")
     os_echo(g+"strings/0x409/product", "Raspberry Screenshot Gadget")
@@ -173,6 +175,7 @@ if __name__ == '__main__':
     os_echo(g+"functions/mass_storage.usb0/lun.0/file", "/tmp/usbdisk.img")
 
     subprocess.run(['mkdir', g+"configs/c.1"], shell=False, check=True)
+    #os_echo(g+"configs/c.1/bmAttributes", "0x80") # bus powered
     os_echo(g+"configs/c.1/MaxPower", "250")
     subprocess.run(['ln', '-s', g+"functions/mass_storage.usb0", g+"configs/c.1"], shell=False, check=True)
 
@@ -184,10 +187,14 @@ if __name__ == '__main__':
     os_echo(g+"functions/hid.usb0/report_desc", "\x05\x01\x09\x06\xa1\x01\x05\x07\x19\xe0\x29\xe7\x15\x00\x25\x01\x75\x01\x95\x08\x81\x02\x95\x01\x75\x08\x81\x03\x95\x05\x75\x01\x05\x08\x19\x01\x29\x05\x91\x02\x95\x01\x75\x03\x91\x03\x95\x06\x75\x08\x15\x00\x25\x65\x05\x07\x19\x00\x29\x65\x81\x00\xc0")
 
     subprocess.run(['mkdir', g+"configs/c.2"], shell=False, check=True)
+    #subprocess.run(['mkdir', g+"configs/c.2/strings/0x409"], shell=False, check=True) # english
+    os_echo(g+"configs/c.2/bmAttributes", "0x80") # bus powered
     os_echo(g+"configs/c.2/MaxPower", "250")
+    #os_echo(g+"configs/c.2/strings/0x409/configuration", "Keyboard configuration") # bus powered
     subprocess.run(['ln', '-s', g+"functions/hid.usb0", g+"configs/c.2"], shell=False, check=True)
 
     #subprocess.run(['ln', '-s', g+"configs/c.1", g+"os_desc"], shell=False, check=True)
+    #subprocess.run(['ln', '-s', g+"configs/c.2", g+"os_desc"], shell=False, check=True)
     subprocess.run(['ls /sys/class/udc/ > '+g+'UDC'], shell=True, check=True)
 
     # RNDIS OS descriptors