trouble updating 7.04 -> 7.10

[sean darcy]

Ante Karamatić wrote:
> U Sub, 28. 02. 2009., u 13:03 -0500, sean darcy je napisao/la:
> 
>> I don't understand why it tries to use //us.archive.ubuntu.com.
> 
> I've just installed feisty in my virtual system, and I'll be able to
> check upgrade problems in couple of hours. So, get back later for
> information.
> 
> 
> 
Thanks. In the mean time I've think I've narrowed it down.

Each time it runs do-release-upgrade sticks the name of the local mirror in:

cat sources.list.d/prerequists-sources.list
# sources.list fragment for pre-requists (one with countrymirror, one 
fallback)
deb http://us.archive.ubuntu.com/ubuntu feisty-backports 
main/debian-installer

It'll overwrite whatever is there.  And, of course, 
us.archive.ubuntu.com does have feisty.

I tried the trick in https://help.ubuntu.com/community/UpgradeProblems
of setting the ip address for us.archive.ubuntu.com to the address for 
old-releases. That didn't work because because the nslookup ip address 
doesn't actually resolve to the same place as old-releases.ubuntu.com.

sean