powertop tries to execute hardcoded /usr/sbin/hciconfig

[Anatoly Borodin]

Ubuntu: 15.10-17.10

Toggling the "Bluetooth device interface status" tunable tries to execute commands `/usr/sbin/hciconfig hci0 up` and `/usr/sbin/hciconfig hci0 down`, and produce messages `sh: 1: /usr/sbin/hciconfig: not found`.

See bt_tunable::bt_tunable() in src/tuning/bluetooth.cpp (https://github.com/fenrus75/powertop/blob/master/src/tuning/bluetooth.cpp)

But hciconfig is in /bin in Ubuntu (see dpkg -L bluez | fgrep hciconfig), starting around the version 5.35-0ubuntu2 in Ubuntu 15.10.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian K. White (bkw777)]

This goes back to at least 2014.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=772571

Except it sounds like maybe it shouldn't be using hciconfig at all for bt for other reasons:
http://www.spinics.net/lists/linux-bluetooth/msg64021.html

So, bluetoothctl? btmgmt?

Maybe it's just as well this hard-coded path is wrong, because after I create a symlink to /bin/hciconfig, powertop hangs sometimes on startup, and any time Itry to toggle bluetooth from within powertop. At least with the broken hardcoded path, everything else works!