Upgrade from Ubuntu 9.10 to 10.04
in my case during the upgrade the OS freeze, then I have rebooted.
At the reboot Ubuntu 10.04 arrive to the login but the keyboard doesn't work (even external keyboard)
Then I have put a cd installation of Ubuntu 9.04 alternate , write rescue on boot and then following the menus
I have choosed the root partition to mount, then manually I have mount eveun the /home partition ( in my case was separated)
For fix the keyboard problem it seem that is needed only to remove the "mouseemu" package
sudo apt-get remove mouseemu
in my case before doing that and see the solution I have done other actions, in case only removing the mouseemu is not sufficient these are the other actions that I have done:
apt-get -f install
dpkg --configure --pending
sudo echo "hid-apple" >> /etc/initramfs-tools/modules
After all I have rebooted the OS, but when it start and the keyboard work, after the login I enter in the graphical session but without any gnome-panel.
For fix gnome-panel:
sudo apt-get remove ubuntu-desktop
sudo apt-get install ubuntu-desktop
With this new Ubuntu version the fan come back to work so you can have in the /etc/modules the termal module .
Unfortunately the cpu ondemand or conservative scaling look like continue not work like the previous versions.