We've got a pixfalcon based home-built quadcopter and using QGC 3.2 on Linux (Ubuntu 16.04.2) for quite a while without problems.
We were always able to run through the whole calibration process and we ended up with a flying quadcopter.
I just recently updated the PX4 firmware to latest stable release and (I think) since then the whole Power battery calibration section in QGC is blank.
I can see the calibration values in Parameters, but since the PX4 firmware update the Gyro and Power needed recalibration - gyro recalibration was easy, but went to Power section and there's nothing there!
I updated QGC using the Linux app image, v3.2.2 and the issue still exists - retried PX4 firmware update too, no difference - Power section still missing.
I gave in and installed QGC on Windows 7 x64 from the latest stable download - Power section is available and working - I was able to calibrate the battery voltage as per normal.
Is this a known issue? any work-arounds? I'd prefer to keep using QGC on Linux.
Quadcopter still flies well and battery calibration is good.