Unity “cannot register the panel shell” [closed]

Question

I updated my 10.10 to Natty Narwal twice with the update-manager. First time all was ok, just a few bugs with the beta version, but suddenly it crashes (I don't know why) while updating the packages. So I installed 11.04 again with update manager, and now unity is not installed.

I tried to add ppa:unity/ppa and then install with apt-get install unity

but when I launch it :

jeremy@jeremy-laptop:~$ unity
unity-panel-service: aucun processus trouvé
Backend     : gconf
Integration : true
Profile     : unity
Adding plugins
Initializing core options...done
Initializing bailer options...done
Initializing detection options...done
Initializing composite options...done
compiz (opengl) - Fatal: GLX_EXT_texture_from_pixmap is missing
compiz (opengl) - Fatal: Software rendering detected
compiz (bailer) - Info: Ensuring a shell for your session
jeremy@jeremy-laptop:~$ Cannot register the panel shell: there is already one running.

I don't know why... and I hope you will have the answer to my question

Answer 1

First of all I loled when I read (excuse my English, I'm french) you made my day and it's not bad at all :P

Now.. the following error tells me, that you don't have compoziting enabled:

compiz (opengl) - Fatal: GLX_EXT_texture_from_pixmap is missing

You can fix this by following THIS guide.

But before you dive into the guide, you migth try to reconfigure the xserver:

sudo dpkg-reconfigure xserver-xorg

Or you can rename the xorg.conf file (if it exists) and let ubuntu try to reconfigure the graphics for you:

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf_backup

Also check THIS out.

good luck!