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I've been trying to dual-boot Ubuntu alongside Windows 8 on my Thinkpad T530, with no consistent success. I was able to burn the .iso image for 12.04 onto a DVD and then boot the DVD at startup, and finally install Ubuntu on a separate partition (done on Ubuntu installation Menu). I was able to explore around Ubuntu for a while, but this had to be done while SecureBoot was off. If I restarted, I wouldn't be able to access Windows 8 unless I went to BIOS and turned SecureBoot on. Once on, Windows would take me to the this screen (where the options would be Windows 8 and Ubuntu, I had tried to install Ubuntu on previous occasions, to no avail as explained above). Once I click Ubuntu, this screen appears. If SecureBoot was off, I was able to access the GRUB2 menu and go from there to access Ubuntu. So... all this was yesterday. I turned my laptop on today and am not able to access Ubuntu if Secureboot is ON or OFF. Only Windows 8.
Any idea how I can fix this? I have a Ubuntu partition that I cannot access anymore, and my dual-boot screen for Windows does not work for Ubuntu. I understand that I must have done the installation for Ubuntu on my Win8 incorrectly, any way to fix this without a clean reinstall or harddrive restore?
Thanks a lot for the help.