Works for me on XperiaX in both 4.0.1.45 and 4.0.1.48.
To look at the logs it’s probably easiest
- Under “Settings → Developer tools” enable “Developer mode” and “Remote connection”
- Connect the phone to you computer using USB and select “Developer mode” when prompted
-
ssh
into the device from your computer (If you have WindowsPuTTY
might be the program to use) - Become super user using
devel-su
and the same password as shown for remote connections (be cautious, you have the powers to make your phone completely unusable now!) - Run
journalctl -f
to watch what is being written to the log - Start the program in question on the phone, the log is updated in your
ssh
session - Don’t forget to press Control-C to stop the log output and Control-D to leave super user mode before an accident happens
This is the general system log which has helped me to solve a problem (caused by myself) with the 4.0.1.15 upgrade. There is also a dedicated Android log IIRC. Don’t remember by heart now how to read it, it’s somewhere in the forums.