Hi guys, for the whole story have a look here: http://www.phoronix.com/scan.php?page=news_item&px=MTI4ODQ https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557

New kernels will arrive soon with a fix for this issue. Till then please be very carefull with UEFI mode on Samsung notebooks.

Thanks. greetings tpowa