View logs on Device / Wont see my phone

on my ubuntu box adb is here:
/usr/lib/jvm/android-sdk-linux_x86/platform-tools

Run these:
sudo ./adb kill-server
sudo ./adb devices (it should no longer say ????????????? no perms)

If the above doesn't work - then you lack permission so run as root
~$ sudo -s
~# ./adb kill-server
~# ./adb devices


To view logs for '/busmapper' app:
./adb logcat *:I | grep '/busmapper'