I kept on getting this error message:
<< getvar:secure FAILED (remote: 'GetVar Variable Not found')
I had updated my X10III to Android 12, so I thought it was that, but using Emma to flash Android 11 didn’t help. Disabling autosuspend with powertop didn’t help; I had to disable autosuspend altogether:
echo -1 > /sys/module/usbcore/parameters/autosuspend`
Now the flashing proceeds as expected, and I’m at the “Ahoj!” screen