Black screen after 4.11 update

[Georgi Kourtev]

Hi all,

After upgrading to 4.11 on 12.04, I had a black screen with the cursor
after login.  Googled a bit and found out that plasma-desktop was not
install after the upgrade.  I did install it.  Now I can normally login,
but a bunch of packages are missing (like muon, kdepim, etc.) In konsole I
see a number of pakcges that were selected during the update, but now
apt-get is saying that they are not needed.  These are:

libmusicbrainz5-0 libmarblewidget15 python-pyudev plasma-active-imageviewer
plasma-active-mobilecomponents xscreensaver-gl nepomuk-core libhomerun0
libqtmultimediakit1
  linux-headers-3.2.0-48 linux-headers-3.2.0-49 libjpeg-turbo-progs
plasma-widgets-active share-like-connect-data xscreensaver-screensaver-bsod
linux-headers-3.2.0-48-generic
  kde-artwork-active libkwinnvidiahack4 startactive-ksplash-theme libgle3
plasma-active-settings app-install-data-partner netpbm
xscreensaver-gl-extra libkwinglutils1abi1
  libnetpbm10 libkipi10 linux-headers-3.2.0-49-generic
libqtwebkit-qmlwebkitplugin share-like-connect libdeclarative-multimedia
plasma-active-data libjpeg-progs
  plasma-active-webbrowser xscreensaver-data xscreensaver-data-extra
startactive-data libokularcore2abi1

I am not sure I must remove these. Apparently the update messed something
up.  Any ideas how can I go back to a stable system?

Thanks,
gk
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