Hi Callum, For use with osmo-gsm-tester we keep our own downstream fork at sysmocom: https://gitea.sysmocom.de/sysmocom/ofono This repo contains an "osmo-gsm-tester" branch based on upstream's master (a bit outdated now, may need some rebasing work): https://gitea.sysmocom.de/sysmocom/ofono/src/branch/osmo-gsm-tester That branch contains mostly QMI fixes and improvements (like initial call support) which hasn't yet been submitted/merged in upstream. On top of those fixes and improvements there are a few patches named "NOT-FOR-MERGE" or "NOT-FOR-UPSTREAM", which contain some handy modifications for our own osmo-gsm-tester, which are not of interest or cannot be merged upstream. The "NOT_FOR_MERGE: decode qmi messages with libqmi" patch will help you in debugging whatever ofono is doing in QMI with the modem. The patch "NOT-FOR-MERGE: ignore disconnecting network interface" is the patch you are looking for. Note that ofono versions others than the branch I presented are not known to work properly with osmo-gsm-tester. Regards, Pau -- - Pau Espin Pedrol <pespin@sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte