few days ago I UPGRADED my Ubuntu 12.10 to Ubuntu 13.04 version on my NP300E5C samsung notebook with ssd. I reloaded ubuntu few times and everything has gone well, BUT after a complete shutdown I restarted my notebook and, loading Kernel version 3.8.0, it hangs on black screen and Ubuntu cannot load. It works only selecting kernel version 3.5.0; I don't have a dual boot. I boot Ubuntu with UEFI boot-loader embedded in my samsung pc. Please help me, it is my working pc and is very important to have all things working fine for my job. Thanks for your time
Solved the problem trivially. I started first time with kernel 3.5.0.x then I rebooted and then shutdown and magically it worked and works fine with 3.8.0.x kernel. I don't know why, I think that's some grub strange behavior, in fact I had the same problem with 12.10 version and I re-installed grub through boot-repair tool.