unable to upgrade ubuntu from 14.04 to 16.04

[李白|字一日]

I can't send u full executing flow message due to size control, but the
result is the same.

2016-03-26 17:58 GMT+08:00 Colin Law <clanlaw at gmail.com>:

> On 26 March 2016 at 09:23, Colin Law <clanlaw at gmail.com> wrote:
> > On 26 March 2016 at 09:10, 李白|字一日 <calidion at gmail.com> wrote:
> >> failed still.
> >
> > Please don't top post, the convention on this list to to insert the
> > reply at appropriate point(s) in previous message.  Thanks.
> >
> > Can you copy/paste the full output from
> > sudo  do-release-upgrade  -d
>
> Also have you got anything installed from non-standard repositories
> (ppas or others)?  Have a look in Software & Updates > Other Software
> to see if you have any other repositories enabled.
>
> If yes purge any ppas you are using (use ppa-purge) and uninstall any
> packages from non-standard repositories and disable those repos.  You
> can find what the packages are in Synaptic.
>
> Then in Synaptic uninstall anything in the section 'Installed (local
> or obsolete)' except ubuntu-extras-keyring.
>
> Then do the update, dist-upgrade and do-release upgrade again.
>
> By the way, I presume that you made sure you had everything important
> backed up before starting any of this.
>
> Colin
>
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