hans@damogran ~ $ sudo do-release-upgrade 
Checking for a new ubuntu release
Done Upgrade tool signature
Done Upgrade tool
Done downloading            
extracting 'lucid.tar.gz'
authenticate 'lucid.tar.gz' against 'lucid.tar.gz.gpg' 
tar: Removing leading `/' from member names

Reading cache

Checking package manager
Reading package lists: Done
Reading state information: Done
Reading state information: Done
Reading state information: Done
Done downloading            
Reading package lists: Done
Reading state information: Done
Reading state information: Done
Reading state information: Done

Updating repository information
WARNING: Failed to read mirror file
Done downloading            

Checking package manager
Reading package lists: Donelucid-security/multiverse Packages: 95   
Reading state information: Done
Reading state information: Done
Reading state information: Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade 

An unresolvable problem occurred while calculating the upgrade: 
E:Unable to correct problems, you have held broken packages. 

This can be caused by: 
* Upgrading to a pre-release version of Ubuntu 
* Running the current pre-release version of Ubuntu 
* Unofficial software packages not provided by Ubuntu 

If none of this applies, then please report this bug against the 
'update-manager' package and include the files in 
/var/log/dist-upgrade/ in the bug report. 


Restoring original system state

Aborting
Reading package lists: Donekarmic-security/multiverse Packages: 95   
Reading state information: Done
Reading state information: Done
Reading state information: Done
hans@damogran ~ $