In a user build, adb currently goes offline when the screen locks, and after 12 
hours. 

You can disable the 12-hour timer using this script: 
https://gist.github.com/dhylands/6253999 

On eng and user-debug builds, adb stays on all of the time. 

Enabling/Disabling other USB functions (USB tethering and/or USB Mass Storage) 
will also temporarily disable adb while the USB setting changes. This s 
typically for less than a second, but it will cause an adb session to be 
dropped. 

I've also filed a couple of bugs related to adb: 
https://bugzilla.mozilla.org/show_bug.cgi?id=1035437 - Add an adb wakelock 
https://bugzilla.mozilla.org/show_bug.cgi?id=1035423 - Add a property which 
allows adb to always stay enabled. 

I put these up as mentored bugs, so if anybody would like to tackle them, I'm 
happy to provide guidance. 

Dave Hylands 

----- Original Message -----

> From: "A. Crespo" <[email protected]>
> To: "Andreas Pehrson" <[email protected]>
> Cc: "Dev B2G List" <[email protected]>
> Sent: Sunday, July 20, 2014 1:54:32 PM
> Subject: Re: [b2g] Device goes offline when building.

> It seems to be an error related to ADB:
> http://playingwithsid.blogspot.com.es/2013/05/android-device-offline-fixing-adb.html

> I had the same issue with the Flatfish, by the way. I have fixed it using
> VirtualBox and loading its usb by default. It's very strange.

> 2014-07-20 22:21 GMT+02:00 Andreas Pehrson < [email protected] > :

> > Then I'm not sure what it could be. I don't have a flame myself so I'm not
> > aware of any specific issues there.
> 

> > Check at what point it goes offline and maybe you can nail it down
> > eventually.
> 

> > Andreas Pehrson --- Software Engineer
> 

> > (+47) 959 60 374 | [email protected] | www.telenordigital.com
> 

> > On Sun, Jul 20, 2014 at 5:25 PM, A. Crespo < [email protected] >
> > wrote:
> 

> > > Hi Andreas,
> > 
> 

> > > Of course, I had disabled the lock screen. But maybe may it be related to
> > > it?
> > 
> 

> > > Thanks.
> > 
> 

> > > 2014-07-20 17:21 GMT+02:00 Andreas Pehrson < [email protected] >
> > > :
> > 
> 

> > > > Do you have a lock screen enabled on your device? Adb is turned off
> > > > when
> > > > the
> > > > lock screen is activated. Turn it on again by turning on the screen and
> > > > unlocking the lock screen. Turn it on permanently by disabling the lock
> > > > screen.
> > > 
> > 
> 

> > > > Andreas Pehrson --- Software Engineer
> > > 
> > 
> 

> > > > (+47) 959 60 374 | [email protected] | www.telenordigital.com
> > > 
> > 
> 

> > > > On Sun, Jul 20, 2014 at 4:15 PM, A. Crespo < [email protected] >
> > > > wrote:
> > > 
> > 
> 

> > > > > Hi,
> > > > 
> > > 
> > 
> 

> > > > > I'm trying to build B2G for a Flame, but when I try to run build.sh,
> > > > > I
> > > > > get
> > > > > the following error: "error: device offline".
> > > > 
> > > 
> > 
> 

> > > > > After that, I need to reattach the device to the computer to get
> > > > > again
> > > > > access
> > > > > by shell to the device.
> > > > 
> > > 
> > 
> 

> > > > > My udev rules are the following rules:
> > > > 
> > > 
> > 
> 
> > > > > http://paste.ubuntu.com/7825165/
> > > > 
> > > 
> > 
> 

> > > > > So why is the Flame going offline?
> > > > 
> > > 
> > 
> 

> > > > > Best regards.
> > > > 
> > > 
> > 
> 

> > > > > _______________________________________________
> > > > 
> > > 
> > 
> 
> > > > > dev-b2g mailing list
> > > > 
> > > 
> > 
> 
> > > > > [email protected]
> > > > 
> > > 
> > 
> 
> > > > > https://lists.mozilla.org/listinfo/dev-b2g
> > > > 
> > > 
> > 
> 

> _______________________________________________
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