Fugu Gaia fd2154a0f288820933bf727c2b2af3b1b1f47896 Gecko d8919d498a7bc7c49d7c0eebe5bf340e094c47c0 BuildID 20140117145953 Version 28.0a2 Previously if we set pref("ril.debugging.enabled", true); in user.js, we can have message like RIL Worker and other I/Gecko message logged. But now it only has RIL[0] and RIL[1]. We have to replace omni.ja with this.DEBUG_ALL = true; in ril_consts.js. And this has to be done by pull out the file, update the value and push it back each time we change build(or sometimes you can't enter OS after replace omni.ja). So hope that this can be fixed in order to enable RIL log more easily.

We had met this in bug 820699 before. If the initial profile, which is located in /data/b2g/mozilla/*.default, has "ril.debugging.enable" included [1], the one in /system/b2g/defaults/pref/user.js will not taking effect. It seems it can be reproduced by "./flash.sh gaia" [1]. Since the preference is only used for ril debugging, we could consider to remove the default value [2] from user.js to avoid this behavior. [1] https://bugzilla.mozilla.org/show_bug.cgi?id=820699#c4

It should work if you toggle the flag from "Settings > Developer > RIL output in ADB" and then reboot the phone