Today the upgrade suggestion popped up and I let my ubuntu 13.04 upgrade. Everything worked without problem it seemed but after the final stage (reboot), the computer no longer comes up.
I used to have an entry "ubuntu" in the "BIOS"'s config section on boot order. (I say "BIOS" because the Lenovo S205 is of course some early UEFI shitware which always only barely worked with Ubuntu and I don't know the correct name for what the BIOS is now called in this brave new world).
Now the only entries are USB HDD, ATA HDD0, USB FDD USB CD, PCI LAN
If I boot normally (i.e. without pressing F2 to get into the "BIOS") I only see two options:
1. ADA HDD0: TOSHIBA MK3265GSX
2. PCI LAN: Realtek PXE B02 D00
Selecting 1. just seems to do a normal reboot going back to that selection screen after maybe 2-3 seconds.
So, I guess something in the upgrade (installing the latest kernel?) blew that UEFI boot entry...
Any idea how to get that back? Do I need to do a new install from USB?