user-1: I have just programmed a new micro, loaded the basic blink code in it. After that neither my laptop, nor my desktop sees it anyway with the following usb error:
Fri Apr  1 14:32:01 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:01 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:02 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:03 2016] usb 1-2: device not accepting address 8, error -62
[Fri Apr  1 14:32:03 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:03 2016] usb 1-2: device not accepting address 8, error -62
[Fri Apr  1 14:32:03 2016] usb 1-2: USB disconnect, device number 8
[Fri Apr  1 14:32:03 2016] usb 1-2: new full-speed USB device number 9 using ohci_hcd
[Fri Apr  1 14:32:04 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:04 2016] usb 1-2: device descriptor read/64, error -62

If I push the reset button on it it comes back a bit then disappears again:
22620.495256] usb 1-2: New USB device found, idVendor=2341, idProduct=0037
[22620.495263] usb 1-2: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[22620.495268] usb 1-2: Product: Arduino Micro   
[22620.495272] usb 1-2: Manufacturer: Arduino LLC
[22620.497393] cdc_acm 1-2:1.0: ttyACM0: USB ACM device
[22627.966141] usb 1-2: USB disconnect, device number 32
[22628.432089] usb 1-2: new full-speed USB device number 33 using ohci_hcd
[22628.572111] usb 1-2: device descriptor read/64, error -62

Anybody experienced this? I have tried to reconnect it multiple times to both computers, even tried a new cable doesn't help.

user19797: The USB part of the Atmega32U4 needs quite a bit of software to operate correctly, which is either not included in the basic blinky example or you got a binary for a different Arduino model.
The syslog looks like there is a bootloader present after Reset for a couple of seconds..
[22620.497393] cdc_acm 1-2:1.0: ttyACM0: USB ACM device
     ^
[22627.966141] usb 1-2: USB disconnect, device number 32
     ^

.. which shuts down and starts blinky. This is documented on the ArduinoBoardMicro page.
Re-flashing the chip is a bit tricky in this state, as you must press the reset button at the "right" time just before the software wants to access the chip.

-1: <p>I have just programmed a new micro, loaded the basic blink code in it. After that neither my laptop, nor my desktop sees it anyway with the following usb error:</p>

<pre><code>Fri Apr  1 14:32:01 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:01 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:02 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:02 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:03 2016] usb 1-2: device not accepting address 8, error -62
[Fri Apr  1 14:32:03 2016] usb 1-2: reset full-speed USB device number 8 using ohci_hcd
[Fri Apr  1 14:32:03 2016] usb 1-2: device not accepting address 8, error -62
[Fri Apr  1 14:32:03 2016] usb 1-2: USB disconnect, device number 8
[Fri Apr  1 14:32:03 2016] usb 1-2: new full-speed USB device number 9 using ohci_hcd
[Fri Apr  1 14:32:04 2016] usb 1-2: device descriptor read/64, error -62
[Fri Apr  1 14:32:04 2016] usb 1-2: device descriptor read/64, error -62
</code></pre>

<p>If I push the reset button on it it comes back a bit then disappears again:</p>

<pre><code>22620.495256] usb 1-2: New USB device found, idVendor=2341, idProduct=0037
[22620.495263] usb 1-2: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[22620.495268] usb 1-2: Product: Arduino Micro   
[22620.495272] usb 1-2: Manufacturer: Arduino LLC
[22620.497393] cdc_acm 1-2:1.0: ttyACM0: USB ACM device
[22627.966141] usb 1-2: USB disconnect, device number 32
[22628.432089] usb 1-2: new full-speed USB device number 33 using ohci_hcd
[22628.572111] usb 1-2: device descriptor read/64, error -62
</code></pre>

<p>Anybody experienced this? I have tried to reconnect it multiple times to both computers, even tried a new cable doesn't help.</p>
 19797: <p>The USB part of the Atmega32U4 needs quite a bit of software to operate correctly, which is either not included in the basic blinky example or you got a binary for a different Arduino model.</p>

<p>The syslog looks like there is a bootloader present after Reset for a couple of seconds..</p>

<pre><code>[22620.497393] cdc_acm 1-2:1.0: ttyACM0: USB ACM device
     ^
[22627.966141] usb 1-2: USB disconnect, device number 32
     ^
</code></pre>

<p>.. which shuts down and starts blinky. This is documented on the <a href="https://www.arduino.cc/en/Main/ArduinoBoardMicro" rel="nofollow">ArduinoBoardMicro</a> page.</p>

<p>Re-flashing the chip is a bit tricky in this state, as you must press the reset button at the "right" time just before the software wants to access the chip.</p>
