$ adb devices
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
** daemon still not running
error: cannot connect to daemon
$ ps -ef | grep adb
jd 19967 1 0 19:06 pts/3 00:00:00 adb -P 5037 fork-server
jd 19983 7405 0 19:09 pts/3 00:00:00 grep --color=auto adb
Android is 4.4.2 (nothing newer is available for my phone.
Developer option set. usb debugging enabled.
yet, when I plug my phone to usb on laptop,
laptop does not mount anything, nor does any icon
appear on the panel as a result of plugging in.
Also, the phone does not pop up a screen asking me
to enable USB in data mode or any other mode.