raspberry 4 XBox One Bluetooth controller systemd entry

chriej

To pair the controller I have to do this:

root@raspberrypi:/etc/rc2.d# echo 1 > /sys/module/bluetooth/parameters/disable_ertm
root@raspberrypi:/etc/rc2.d# cat /sys/module/bluetooth/parameters/disable_ertm
Y

After than I can pair and configure the controller in retropie. However after a reboot I have to fire the echo command again.
So I tried to automate this.
To add the line:
echo 1 > /sys/module/bluetooth/parameters/disable_ertm
in
/etc/rc.local doesn't work. No change after a reboot in the config file

The next idea was to create a systemctl entry:

[Unit]
After=bluetooth.target

[Service]
ExecStart=/usr/local/bin/myStartUp.sh
User=root
Group=root

[Install]
#WantedBy=default.target
WantedBy = multi-user.target

root@raspberrypi:~# cat /usr/local/bin/myStartUp.sh
#!/bin/sh
echo 1 > /sys/module/bluetooth/parameters/disable_ertm

root@raspberrypi:~# ls -lha /usr/local/bin/myStartUp.sh
-rwxr-xr-x 1 root root 65 Dec 21 15:30 /usr/local/bin/myStartUp.sh

 systemctl daemon-reload
 systemctl enable myStartUp.service

But I get this error after a system reboot:

   Loaded: loaded (/etc/systemd/system/myStartUp.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sat 2019-12-21 15:58:35 CET; 7min ago
  Process: 357 ExecStart=/usr/local/bin/myStartUp.sh (code=exited, status=2)
 Main PID: 357 (code=exited, status=2)

Dec 21 15:58:35 raspberrypi systemd[1]: Started myStartUp.service.
Dec 21 15:58:35 raspberrypi myStartUp.sh[357]: /usr/local/bin/myStartUp.sh: 2: /usr/local/bin/myStartUp.sh: cannot create /sys/module/bluetooth/parameters/disable_ertm: Directory nonexistent
Dec 21 15:58:35 raspberrypi systemd[1]: myStartUp.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Dec 21 15:58:35 raspberrypi systemd[1]: myStartUp.service: Failed with result 'exit-code'.

When I execute systemctl start myStartUp.service manual under the user pi and root the script works.

pi@raspberrypi:~ $ systemctl start myStartUp.service
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to start 'myStartUp.service'.
Multiple identities can be used for authentication:
 1.  ,,, (pi)
 2.  root
Choose identity to authenticate as (1-2): 1
Password:
==== AUTHENTICATION COMPLETE ===
pi@raspberrypi:~ $ systemctl status myStartUp.service
● myStartUp.service
   Loaded: loaded (/etc/systemd/system/myStartUp.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Sat 2019-12-21 16:19:11 CET; 7s ago
  Process: 2553 ExecStart=/usr/local/bin/myStartUp.sh (code=exited, status=0/SUCCESS)
 Main PID: 2553 (code=exited, status=0/SUCCESS)

Dec 21 16:19:11 raspberrypi systemd[1]: Started myStartUp.service.
Dec 21 16:19:11 raspberrypi systemd[1]: myStartUp.service: Succeeded.

mitu

Such complicated setup just to pass a parameter to a kernel module.
Create a simple text file in /etc/modprobe.d/bluetooth.conf with the contents

options bluetooth disable_etrm=y

then reboot - you don't need any extra services.

chriej

@mitu said in raspberry 4 XBox One Bluetooth controller systemd entry:

options bluetooth disable_etrm=y

I tried your suggestion. But it doesn't set the flag.

mitu

Hm, try this instead - in the .conf file

options bluetooth disable_ertm=1

chriej

My /etc/modprobe.d# nano bluetooth.conf has this one line as content, but the flag doesn't get set.

options bluetooth disable_etrm=1

mitu

@chriej I tested this on a Pi4 and it works. Make sure you didn't mis-type anything and you reboot after you edit the file.

pi@retropie ~ $ cat /sys/module/bluetooth/parameters/disable_ertm
Y
pi@retropie ~ $ cat /etc/modprobe.d/bluetooth.conf
options bluetooth disable_ertm=1

chriej

THX!
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