It took quite some time for me to find this solution. When the average
user starts googling this, they are going to find all sorts of things
which do not apply, for example:
http://itsfoss.com/fix-update-errors-ubuntu-1404/
https://askubuntu.com/questions/615203/software-updates-stuck-downloading-after-15-04-upgrade
What a nightmare! This demonstrates why the system update utility needs
to include a twitter-type client to inform the user of emerging issues
related to broken update functionality. How else will the average user
cope with a new issue like this, when there are so many possible causes
for the same type of problem?
Yes I know, it poses the question of who should have the authority to
broadcast alerts. Perhaps a majority vote by a jury of lead developers
or team managers who could activate the feature by signing a proposed
broadcast message with their PGP key. Moderators of the forum or the
bug tracker would then submit proposals for broadcast messages to a
mailing list that goes to the jury. This would eliminate the
possibility of using the broadcast system for spam.
In any case, the manual fix in the description is not sufficiently clear: many
people who are capable of typing terminal commands will not know to replace
'amd64' with 'i386' or whatever is appropriate. A script which automates this
might be a better solution.
_
@neil.mayhew
> I'm not sure what happens if someone is using Synaptic or Gnome
Software. I assume it would be necessary to use System Monitor to kill
off appstreamcli.
@olliniem
> forever inactive window with no possibility to interfere
Best quick recovery method is to launch 'top' in terminal & kill that
process ID. It does affect Software Center, Software Updater, adding
PPA's, et cetera.
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https://bugs.launchpad.net/bugs/1579712
Title:
Refresh hangs indefinitely, appstreamcli using 100% CPU
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