I can't figure out why my nexus 4 is absent from the list of adb devices. I've tried the following

* $ adb kill-server; adb devices
* $ echo 0x18d1 >> ~/.android/adb\_usb.ini
$ adb kill-server; adb devices
* Changed usb computer connection type to PTP instead of MTP
* Restarted the phone etc

Adb is on my path. Nexus 4 shows up when I view System Information.

I've tried asking on xda devs but no luck. Any suggestions on what I can try?

Thanks in advance