upgrade feisty gutsy failed, system unstable

Press ctrl+alt+F1 login, and enter:
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install ubuntu-desktop
(If that fails then do this:)
sudo apt-get install gnome-themes

Paste any show-stopping errors. Sometimes things mess up from
dependencies during an upgrade, but is easily corrected as it finishes.
Or with minor self switching.

KJ wrote:
> New question #15384 on Ubuntu:
> https://answers.launchpad.net/ubuntu/+question/15384
>
> Some days ago i tried to update my Xubuntu installation from feisty to gutsy rc1. Everything went fine until the installation of gnome-themes package started. It refused to install because of broken dependencies and asked me to run dpkg --configure to solve the problem. It didnt work so I removed the gnome-themes package using apt-get. Now i have a partially broken feistygibbon since al lot of packages are already upgraded an some arent. I cant run firefox or synaptic anymore:
> /usr/lib/firefox/firefox-bin: /usr/local/lib/libpng12.so.0: no version information available (required by /usr/lib/libcairo.so.2)
> /usr/lib/firefox/firefox-bin: symbol lookup error: /usr/lib/libgdk-x11-2.0.so.0: undefined symbol: g_once_init_enter_impl
>
> I am not able to restart the upgrade process by using update-manager -p -d or whatever, apt-get doesnt find any new packages. Is there any way to force a restart of the upgrade? Any reason why it should crash installing gnome-themes package?
>
> I'd appreciate your help :-)
>
> Thx
>
>
>

Is
sudo apt-get install ubuntu-desktop
also suitable for Xubuntu?
if i try to execute
sudo apt-get install xubuntu-desktop
apt-get responds:
xubuntu-desktop is already the newest version
if i force it to reinstall it only downloads one file with 13kb of size:
.../xubuntu-desktop_2.50_amd64.deb

sudo apt-get install ubuntu-desktop
wants to download some 570 megs but is it right for Xubuntu?

The following happens when i try to run
apt-get install ubuntu-desktop or
apt-get install gnome-themes:

Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut
Reading state information... Fertig
gnome-themes ist schon die neueste Version.
gnome-themes set to manual installed.
0 aktualisiert, 0 neu installiert, 0 zu entfernen und 0 nicht aktualisiert.
3 nicht vollständig installiert oder entfernt.
Es müssen 0B Archive geholt werden.
Nach dem Auspacken werden 0B Plattenplatz zusätzlich benutzt.
Richte gnome-themes ein (2.20.0-0ubuntu1) ...
gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_
gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_
gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_
dpkg: Fehler beim Bearbeiten von gnome-themes (--configure):
 Unterprozess post-installation script gab den Fehlerwert 127 zurück
dpkg: Abhängigkeitsprobleme verhindern Konfiguration von gnome-accessibility-themes:
 gnome-accessibility-themes hängt ab von gnome-themes; aber:
  Paket gnome-themes ist noch nicht konfiguriert.
dpkg: Fehler beim Bearbeiten von gnome-accessibility-themes (--configure):
 Abhängigkeitsprobleme - lasse es unkonfiguriert
dpkg: Abhängigkeitsprobleme verhindern Konfiguration von ubuntu-desktop:
 ubuntu-desktop hängt ab von gnome-themes; aber:
  Paket gnome-themes ist noch nicht konfiguriert.
dpkg: Fehler beim Bearbeiten von ubuntu-desktop (--configure):
 Abhängigkeitsprobleme - lasse es unkonfiguriert
Fehler traten auf beim Bearbeiten von:
 gnome-themes
 gnome-accessibility-themes
 ubuntu-desktop
E: Sub-process /usr/bin/dpkg returned an error code (1)

There seems to be a problem with /usr/local/lib/libpng12.so.0 but forcing a reinstall wont help...
any ideas?

After rebooting not even xserver works any more. Every dist upgrade I try fails.

My xserver died before that. During my upgrade from Fiesty to Gutsy, my upgrade hung at "setting up xserver-xorg" with four and a half hours to go, so I powered off and powered on my machine, and booted into what GRUB said was Ubuntu 7.10, but I haven't finished my upgrade, and now sudo dpkg --configure -a also causes my machine to hang. At the moment my fiestygibbon doesn't mount drives other than the hard disk anymore either.

Any suggestions?

I have exactly the same problem. I tried remove the theme packages and ubuntu-desktop, but no use. It is giving an error saying

gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_
gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_
gtk-update-icon-cache: symbol lookup error: /usr/local/lib/libpng12.so.0: undefined symbol: inflateInit_

Now Xserver is not coming up, not able to login to Desktop. What to do? :(

Finally I figured out the problem. I had installed a local version of libpng12 from sources and it was residing at /usr/local/lib . I fear there was a conflict due to that. I also had many other local versions of other different libraries. I moves all of them to a different folder and ran ldconfig and my system got running again!

Kiran