ModemManager restarts when setting bands on Quectel BG96
$sudo mmcli -G DEBUG $sudo mmcli -m 0 --set-current-bands='egsm' error: couldn't set current bands: 'GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying'
from syslog: Mar 27 14:49:54 raspbian2 ModemManager[1561]: logging: level 'DEBUG' Mar 27 14:50:12 raspbian2 ModemManager[1561]: Setting new list of bands: 'egsm' Mar 27 14:50:12 raspbian2 systemd[1]: ModemManager.service: Main process exited, code=killed, status=11/SEGV Mar 27 14:50:12 raspbian2 NetworkManager[346]: [1585320612.5979] modem-manager: ModemManager no longer available Mar 27 14:50:12 raspbian2 NetworkManager[346]: [1585320612.5981] device (cdc-wdm0): state change: disconnected -> unmanaged (reason 'removed', sys-iface-state: 'removed') Mar 27 14:50:12 raspbian2 systemd[1]: ModemManager.service: Failed with result 'signal'. Mar 27 14:50:12 raspbian2 systemd[1]: ModemManager.service: Service RestartSec=100ms expired, scheduling restart. Mar 27 14:50:12 raspbian2 systemd[1]: ModemManager.service: Scheduled restart job, restart counter is at 4. Mar 27 14:50:12 raspbian2 systemd[1]: Stopped Modem Manager. Mar 27 14:50:12 raspbian2 systemd[1]: Starting Modem Manager... Mar 27 14:50:12 raspbian2 ModemManager[2292]: ModemManager (version 1.10.0) starting in system bus...