Just a reply to help others who run into the same issue.
"df -h" said the filesystem was only 78% in use.
However, the partition uses btrfs which can be fully utilized even if df says
there should be space left.
See:
https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#I_get_.22No_space_left_on_d
Public bug reported:
Bug appeared while upgrading Ubuntu. A popup appeared with security
updates and regular updates. Just clicked ok. After a while it came up
with a notification something went wrong and a request to file a bug.
This might be the same bug as those with (almost) the same summary,
I probably had the same problem. Todays upgrades for 8.10 included
console-setup1.25ubuntu4
During the upgrade process by update manager, I got a message something like
this:
"There are keyboard options in /etc/default/console-setup that are no longer
supported. The configuration file is not upd
