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Re: Bug#771971: dpkg hangs installing "init" during upgrade from wheezy to jessie

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On Thu, 4 Dec 2014 00:56:48 +0000 Steve McIntyre <steve@einval.com> wrote:
> This is reproducible on demand \o/
> I realised that the VM image had a few unneeded packages, so I did
> # apt-get remove --purge x11-common libx11-6 libx11-data
> then
> # apt-get update
> # apt-get dist-upgrade
> and got the same result as my first run.
> On a *second* run I did not do that purge up-front and the upgrade did
> *not* block in the same way.
> -- 
> Steve McIntyre, Cambridge, UK.                                steve@einval.com
> "I've only once written 'SQL is my bitch' in a comment. But that code 
>  is in use on a military site..." -- Simon Booth


Thanks for reporting this.

Just to confirm, is this correctly understood?

 * If you purge "x11-common libx11-6 libx11-data" before upgrading, the
   upgrade hangs.
 * If you keep "x11-common libx11-6 libx11-data" as-is, the upgrade

What state are the above packages before the upgrade?

Can you try to reproduce this again and attach strace or/and gdb to the
dpkg process when it hangs to figure out what it does/where it is stuck.
  Based on Dominik's remark (100% cpu usage) in comment #15, I suspect
it is in an infinite loop.  Though I would appreciate it, if we can
confirm or disprove that.


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