I've loaded the latest release of px4 firmware and qgroundcontrol fails to calibrate.
I get the following errors after attempting to calibrate the radio:
store parameters command failed
settings save error
Error: operation not permitted
I'm using v1.7.3 of the firmware from here: https://github.com/PX4/Firmware https://github.com/PX4/Firmwarehttps://github.com/PX4/Firmware https://github.com/PX4/Firmware
The qgroundcontrol version is: v3.3.0
I've also tried an older version of qgroundcontrol and encountered the same issues.
UPDATE: This may have been fixed by commit: a25ca0c37d63ea090fda66c199a3b31dd0435d83
This issue is fixed in the latest commit to the master branch.
However, the most recent "stable release" (v1.7.3) _does_ have this bug. I didn't delete this post because I wanted to provide warning/info for others that might encounter this issue.
I'd recommend that support staff try the latest stable release of the firmware so that they are aware of these issues.