<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="#954F72"> <div class="WordSection1"> Thank you Aleksander for the tips and help.<o:p></o:p> <o:p> </o:p> I tried a newer distro with <o:p></o:p> <div> Setting up network-manager (1.14.6-2+deb10u1) …<o:p></o:p> Setting up modemmanager (1.10.0-1) ...<o:p></o:p> </div> <o:p> </o:p> I’m still running into errors but I’ll post my question on our Git issues tracker if that is better.<o:p></o:p> <o:p> </o:p> Thanks,<o:p></o:p> <o:p> </o:p> Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986"> Mail</a> for Windows 10 <o:p> </o:p> <div style="mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:aleksander@aleksander.es">Aleksander Morgado</a> Sent: Saturday, April 4, 2020 2:24 AM To: <a href="mailto:valens.dsilva@revivalanalytics.com">Valens D'Silva</a> Cc: <a href="mailto:modemmanager-devel@lists.freedesktop.org">modemmanager-devel@lists.freedesktop.org</a> Subject: Re: ModemManager 1.6.4 on Raspbian Stretch cannot acquire the 'org.freedesktop.ModemManager1' service name </div> <o:p> </o:p> Hey, > > I now see that the port /dev/ttyAMA0 is not whitelisted. > > > > I found a post from an old mailing list on identifying the kernel driver and whitelisting it using this > > > > ACTION!="add|change|move", GOTO="mm_platform_device_whitelist_end" > > SUBSYSTEM!="platform", GOTO="mm_platform_device_whitelist_end" > > DRIVERS=="imx-uart", ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1" > > LABEL="mm_platform_device_whitelist_end" > Please upgrade ModemManager to a newer version, because 1.6.4 is not even the latest version in the 1.6.x stable series. Ideally, you should upgrade to the latest 1.12.8 which is the latest stable version. > > > Before I found all this info I created 2 udev rules for /dev/ttyAMA0 and the /devices/platform/soc/20201000.serial. I named them randomly > > > > cat /etc/udev/rules.d/s7648-ttyama0.rules > > ACTION=="add", KERNEL=="20201000.serial", ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1" > The best way to user-tag the devices, in my opinion, is to use the device sysfs path of the port. E.g. in order to tag a single TTY you would get the full realpath of the port: $ realpath /sys/class/tty/ttyUSB0 /sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4/1-11.4.1/1-11.4.1:1.0/ttyUSB0/tty/ttyUSB0 And then add the tag based on its devpath (tagging the USB interface, and *without* the "/sys" prefix): $ sudo vim /lib/udev/rules.d/78-mm-user.rules ACTION!="add|change|move", GOTO="mm_user_rules_end" DEVPATH=="/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4/1-11.4.1/1-11.4.1:1.0",ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1" LABEL="mm_user_rules_end" Now reload rules and trigger them so that they are re-applied: $ sudo udevadm control --reload $ sudo udevadm trigger Now, check that the tag is really applied: $ sudo udevadm info -p /sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4/1-11.4.1/1-11.4.1:1.0 P: /devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4/1-11.4.1/1-11.4.1:1.0 L: 0 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4/1-11.4.1/1-11.4.1:1.0 .... E: ID_MM_PLATFORM_DRIVER_PROBE=1 After that, restart ModemManager. But please note, ID_MM_PLATFORM_DRIVER_PROBE is no longer supported since 1.12, you should instead use the more generic ID_MM_DEVICE_PROCESS introduced in 1.10, > > > cat /etc/udev/rules.d/ttyama0.rules > > ACTION=="add|change|move", KERNEL=="ttyAMA0", ENV{ID_MM_TTY_FLOW_CONTROL}="rts-cts", ENV{ID_MM_TTY_BAUDRATE}="115200" > Both ID_MM_TTY_BAUDRATE and ID_MM_TTY_FLOW_CONTROL were introduced in ModemManager 1.10. > > > And lastly here is the output of udevadm > > > > udevadm info --attribute-walk /dev/ttyAMA0 > > You shouldn't look at the attributes, you should look at the properties. See the udevadm commands above. Cheers! -- Aleksander <a href="https://aleksander.es">https://aleksander.es</a><o:p></o:p> <o:p> </o:p> </div> </body> </html>