Public bug reported:

I performed an update-manager controlled upgrade from jaunty to karmic
on 20091009.

Update-manager told me it could not complete the upgrade, but would do
as much as possible. I expected it to tell me how to proceed after
finishing, but that did not happen. From earlier experience, I know that
you have to reboot; in a clean installation the installer knows to
continue after the reboot.

After reboot, I seemingly did not have network connection, but I soon
found out that it was the resolver that was broken. I was not familiar
with the new resolver, but eventually found out that I had to do:

resolvconf -a eth0 < /etc/resolv.conf.old

The installation had overwritten /etc/resolv.conf, but luckily I had a
copy. The network was back. It now turns out that I need to repeat the
above resolvconf call after every reboot.

I had to complete the install "manually". The package db was left in an
unconfigured by the update-manager, so I had to go through a number of
aptitude commands to complete the upgrade, including the manual remove
of some packages. During this process, aptitude suggested to remove e.g.
kubuntu-desktop.

As an experienced Ubuntu user, I was able to get a working kubuntu
system relatively fast, but a novice would have been completely lost.

After the upgrade, I am left with some messages on the console which I
still don't understand:

1) Shortly after boot, this:
[    0.746572] pci 0000:05:04.0: BAR 6: address space collision on of device 
[0xfeac0000-0xfeadffff]

2) Lots of these:
Oct  6 13:57:49 dmz-212 udevd-work[928]: rename(/dev//.udev-tmp, /dev//) 
failed: Invalid cross-device link

In addtion, there are problems with postgresql and mysql which I have
not had time to investigate.

** Affects: ubuntu
     Importance: High
         Status: New

-- 
Upgrade jaunty -> karmic beta problematic
https://bugs.launchpad.net/bugs/446174
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