ijoy stone 4GB root and adb with ubuntu

I used chinese version iRoot2_2.0.6_141122_1811_1000_r.apk
and it intalled chinese root (com.mgyun.superuser in /system/app/irootsu.apk), but I installed superuser from koush using fdroid and it replaced it ok

adb shell does not work, despite setting usb debugging in config and tablet says "USB debugging enabled" when plugged

Some tests

adb shell
error: device not found
adb devices
List of devices attached

lsusb
Bus 002 Device 014: ID 2207:0010  

dmesg output when plugged

[ 7911.216166] usb 2-1: new high-speed USB device number 16 using ehci-pci
[ 7911.350384] usb 2-1: New USB device found, idVendor=2207, idProduct=0010
[ 7911.350396] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=4
[ 7911.350403] usb 2-1: Product: Tablet Stone
[ 7911.350410] usb 2-1: Manufacturer: i-Joy
[ 7911.350415] usb 2-1: SerialNumber: D902013112900035A
[ 7911.352183] usb-storage 2-1:1.0: USB Mass Storage device detected
[ 7911.352403] scsi16 : usb-storage 2-1:1.0
[ 7912.353713] scsi 16:0:0:0: Direct-Access     i-Joy                          PQ: 0 ANSI: 2
[ 7912.354288] scsi 16:0:0:1: Direct-Access     i-Joy                          PQ: 0 ANSI: 2
[ 7912.356480] sd 16:0:0:0: Attached scsi generic sg2 type 0
[ 7912.356918] sd 16:0:0:1: Attached scsi generic sg3 type 0
[ 7912.364920] sd 16:0:0:0: [sdb] Attached SCSI removable disk
[ 7912.365533] sd 16:0:0:1: [sdc] Attached SCSI removable disk

Editing "/etc/udev/rules.d/99-android.rules, adding this and restarting does not solve it

SUBSYSTEM=="usb", ATTRS{idVendor}=="2207", ATTRS{idProduct}=="0010", MODE="0666"

sudo /etc/init.d/udev restart

Nothing new adding 0x2207 in .android/adb_usb.ini

But after all this, I decided to reboot ubuntu ... and then it worked