Eclipse won't recognize my Nexus 5 anymore

Question

I'm working on eclipse in ubuntu, I test my mobile app in my nexus 5... Everything was working fine (USB debugging mode is enabled), until tonight : I see that eclipse won't recognize my android anymore it shows me : "Unknown device ????????", I have changed the target SDK to 19 since i have android Kitkat 4.4.2, nothing works, then 17 etc...

I have tested the app on another android phone with Android 4.2.1 and it was recognized well.

I find this very strange since I was running the app on my Nexus 5 yesterday and it was working well..

Do you please have any idea about this ? Thank you.

Answer 1

In some cases, you might need to terminate the adb server process and then restart it." Restart adb service. Try "adb kill-server; adb start-server"

See developer.android.com/tools/help/adb.html