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When I open the Android Device chooser it shows a phone. But, instead of the serial number and other details it shows a series of question marks - "????????".

Any suggestions on how I can use the phone for debugging?

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    Have you installed the Motorola Devicemanager (for the USB driver)? Also make sure the device unlocked and screen is on. My Moto G is displayed correctly in Eclipse on Windows 7. – Robert Mar 21 '14 at 15:31
  • Thanks Robert! The problem was with the selection mode. Apparently MTP doesn't work too well with Ubuntu. When I switched to PTP the USB debugging started working. – msa Mar 23 '14 at 12:16
  • You should mention the used operating system in your next question... – Robert Mar 23 '14 at 14:00
  • You should ask, before replying. – msa Mar 24 '14 at 16:43
  • Usually only Windows users don't mention their operating system. – Robert Mar 24 '14 at 21:30
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The problem was with the selection mode.

Apparently MTP doesn't work too well with Ubuntu. When I switched to PTP the USB debugging started working.

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