Comment 136 for bug 191137

If you do the upgrade, make sure you have hardy-porposed enabled in your installation sources and also either wait maybe until end of next week or make sure that all the needed packages are there. The uploads are still in progress and you want to have matching LUM and LRM packages ready.

Or if you like to be on Hardy faster, you can install freshly and work around the problem (noacpi seems a bit harsh, most people just had to remove the quiet option from the grub commandline) and then go for the 35smb1 kernel I prepared. Then (if hardy-proposed is enabled) you will get updated as soon as the packages are ready.