16.04 update freezing

[Oliver Grawert]

hi,
Am Dienstag, den 29.03.2016, 17:31 +0100 schrieb Alan Pope:
> Hi,
> 
> On -two- three occasions my Pi2 running 16.04 snappy edge has not
> rebooted properly after an update. Typically it freezes at "Starting
> kernel...". If I pull the power cable out and plug back in, it boots
> okay again.  What logs / data should I get from the device/card to
> debug this? It's kinda frustrating to find myself with an unresponsive
> remote device. As an example, I just got this update:-
> 
> ubuntu at localhost:~$ snappy list -v
> Name                Date       Version                          Developer
> canonical-pi2       2016-03-21 3.1                              canonical
> canonical-pi2       2016-03-23 3.2                              canonical*
> canonical-pi2-linux 2016-02-03 4.3.0-1006-3                     canonical
> canonical-pi2-linux 2016-03-07 4.3.0-1006-6                     canonical
> canonical-pi2-linux 2016-03-21 4.4.0-1004-raspi2+20160321.17-52 canonical!
> canonical-pi2-linux 2016-03-21 4.4.0-1004-raspi2-20160321-05-25 canonical
> owncloud            2016-03-21 9.0.0ubuntu1                     canonical*
> ubuntu-core         2016-03-21 16.04+20160321.17-37             canonical!
> ubuntu-core         2016-03-21 16.04-20160321-14-25             canonical
> ubuntu-core         2016-03-02 16.04.0-11.armhf                 canonical
> ubuntu-core         2016-03-03 16.04.0-12.armhf                 canonical
> ubuntu-core         2016-03-07 16.04.0-13.armhf                 canonical
> ubuntu-core         2016-03-08 16.04.0-14.armhf                 canonical
> ubuntu-core         2016-03-08 16.04.0-15.armhf                 canonical
> ubuntu-core         2016-02-03 16.04.0-7.armhf                  canonical
> Reboot to use canonical-pi2-linux version 4.4.0-1004-raspi2+20160321.17-52.
> Reboot to use ubuntu-core version 16.04+20160321.17-37.
> 
> ubuntu at localhost:~$ sudo reboot
> 
> It's been like this for some 15 minutes now:- http://imgur.com/zA8OwAF
> 
the missing serial output is a bug in canonical-pi2 v3.2 that paolo and
I are still researching (that showed up when we added pi3 support to our
binary). the console will still output on HDMI in this case though,
please check there for other issues ...
(the recent cloud-init upload broke booting snappy completely btw, dont
use any of the daily os snaps since last friday (20160325 or newer) they
will hang since cloud-init now battles with snappy who is allowed to
configure the NIC)

also that list of snaps you have there points to a bug in snappy, it
seems to not remove old snaps at all if you upgrade, you should only
have two of each of them installed.

ciao
	oli

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