Yesterday I updated my ubuntu 13.04 to 13.10. After the restart I saw the purple screen and then it was black again, switching to the login screen as usually. But the screen keeps black. I can hear the drum roll for the ready login screen but I can't see anything. I also doesn't have access to the console.
Ok so I googled for this kind of problem and found this article: Black screen after upgrading from 13.04 to 13.10
It seems to be a kernel bug, see here: https://bbs.archlinux.org/viewtopic.php?id=167463
And as a quick solution this was mentioned:
Quick solution is to switch to BIOS mode instead of UEFI mode. = Disable Secure Boot and enable "Launch CSM".
I went to my BIOS right after a restart and looked for UEFI to disable it. It was already disabled... Then I had a look for "Launch CSM" but couldn't find it. Can someone please help me? I'm not a pro with BIOS and so on. I also made no backup because it wouldn't be a problem to re-install ubuntu completely. But this shall only happen in worst case.
I'd be thankful for any kind of suggestions.