Hey, > > I want use "mmcli --report-kernel-event " to access the modem, but the > error occur as follow: > > root@NVTEVM:~$ mmcli > --report-kernel-event="action=add,subsystem=tty,name=ttyUSB > 0" > ModemManager[601]: <debug> [1621557548.457821] [base-manager] kernel event > reported: > ModemManager[601]: <debug> [1621557548.457821] [base-manager] kernel event > reported: > ModemManager[601]: <debug> [1621557548.458234] [base-manager] action: add > ModemManager[601]: <debug> [1621557548.458234] [base-manager] action: add > ModemManager[601]: <debug> [1621557548.458467] [base-manager] subsystem: tty > ModemManager[601]: <debug> [1621557548.458467] [base-manager] subsystem: tty > ModemManager[601]: <debug> [1621557548.458790] [base-manager] name: > ttyUSB0 > ModemManager[601]: <debug> [1621557548.458790] [base-manager] name: > ttyUSB0 > ModemManager[601]: <debug> [1621557548.459218] [base-manager] uid: n/a > ModemManager[601]: <debug> [1621557548.459218] [base-manager] uid: n/a > ModemManager[601]: <warn> [1621557548.499209] [base-manager] couldn't handle > kernel event: No rule files found in '/lib/udev/rules.d' > ModemManager[601]: <warn> [1621557548.499209] [base-manager] couldn't handle > kernel event: No rule files found in '/lib/udev/rules.d' > error: couldn't report kernel event: > 'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Failed: No rule files > found in '/lib/udev/rules.d'' >
How did you install ModemManager? By default we install a series of udev rules files in /lib/udev/rules.d and it looks like you didn't do that. Those files are *required* even when you're not using udev, because the daemon will look for them and parse them e.g. to know port type hints or candidate rules. Without those files, nothing will work. > Is it necessary to install the udev library ? Using udev is definitely better and cleaner, but ModemManager can also be used without udev by using the --report-kernel-event option to report port add/remove events, as you were trying. E.g. the OpenWRT setup does not use udev at all, we have some hotplug scripts that run mmcli --report-kernel-event on every new event instead. -- Aleksander https://aleksander.es _______________________________________________ ModemManager-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
