The issue seemed not a bug but a problem related to my internet provider as
with another internet provider I was able to download (but only some days ago)
the kernel package indicated in my post.
Very strange as issue.
At last not a bug.
Sorry for my wrong post.
** Changed in: update-manager
Sorry for such a delayed response. Are you still having an issue with
the update-manager?
** Changed in: update-manager (Ubuntu)
Status: New = Incomplete
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** Attachment added: updage-manger window that shows the error
https://bugs.launchpad.net/bugs/692348/+attachment/1770966/+files/update_manager.png
** Description changed:
Binary package hint: update-manager
It's some weeks that I haven't be able to download linux-image from
