Unable to upgrade 11.10 to 12.04 (amd64): E:Couldn't configure pre-depend libtinfo5

[Artemis3]

I'm getting this error:

'E:Couldn't configure pre-depend libtinfo5 for libncurses5, probably a dependency cycle.'

And the upgrade cancels reverting the changes.

[jadtech]

try these one by one

 sudo apt-get update 
sudo apt-get install apt python-apt
sudo do-release-upgrade

thoughI guess it not necessary I do a reboot after the python install
see how that goes

[jadtech]

not sure whatthe reason but there is a issue with depking the upgrade for some python apt is nessary to install some libaries required but the python apt unpacks later in the install so everything ends up failing ..


i concider your case fortunate for most the install continues and then on restart the first time there is a load of varied problems from no graphic or guis video that is agfull mouse and touch pads that dont work no keyboard ..

[Artemis3]

I have apt and python-apt already installed...

[Artemis3]

bump

[P Panon]

You might want to try the instructions on entry #23 at bug report 924079 https://bugs.launchpad.net/ubuntu/+s...pt/+bug/924079

[jadtech]

if python-apt has installed then continue the upgrade to finish and the packages that had dependancy issues can install .

try this

 sudo apt-get dist-upgrade -f

hopefully this help this is a known upgrade bug for some packages unpack in a wrong order or server drops sa package or 2 because it is over loaded what ever the cause ..

[Artemis3]

It appears to be related to bug #924079 and will proceed with this workaround: http://aaron-kelley.net/blog/2012/04...endency-cycle/

Success! The workaround allowed me to upgrade.

The workaround is simply to install libtinfo5, libncurses5, and libncursesw5 from precise in oneiric before the upgrade.