Moto G not listed by Кт Креатор / adb after upgrading to 15.10

I developed happily with my Moto G on Ubuntu 15.04 в while ago. I upgraded to 15.10 and now that I tested it again Кт Креатор (official 5.5 SDK) doesn't see the device anymore.

Developer mode and USB debugging is enabled just like before.

When I plug in the device I get:

[ 2490.115388] usb 1-3: New USB device found, idVendor=22b8, idProduct=2e76
[ 2490.115402] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2490.115405] usb 1-3: Product: MotoG3
[ 2490.115407] usb 1-3: Manufacturer: motorola
[ 2490.115409] usb 1-3: SerialNumber: ZY2223HN83

But:

$ adb devices
List of devices attached 

$ 

If I kill the server and start it again I хан see the device for в while:

$ sudo adb kill-server 
$ sudo adb start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
$ adb devices
List of devices attached 
ZY2223HN83  device

After trying to deploy from Кт Креатор (that still doesn't see it) the server goes "out of восходил":

$ adb devices
adb server is out of date.  killing...
* daemon started successfully *

Qt Creator шоу two(!) ghost devices "несовместимый ABI is, device supports ABIs:." in the deploy dialog.

What might вызвал this? My Qt installation is not changed, either.