Ubuntu – “Continue button” grayed out in “installation type” screen during 13.04 installation

Could you try to add the following boot options? (press e when you see that screen and add):

acpi_backlight=vendor acpi_osi=Linux video.use_bios_initial_backlight=0

Because, maybe the monitor backlight is turned off.

In case anybody else has the same issue, the problem was that my hard disk had two real partitions in it. I thought that since the second one was completely unused, Linux would know that it could use that. Instead, the second half of the drive needed to be labelled as unused, completely free space.

1. I booted a live disc, then chose Try Ubuntu.
2. I launched GParted (by typing "gparted" in the search box in top left).
3. In GParted, the top right of the window has a drop down box that lets you select your hard disk. Be sure you pick the right one so you don't accidentally delete data you want. In my case, I switched to /dev/sdb, my second hard drive, and saw that it had "essentially" two partitions (there might have been more for some other OS functions, I can't remember).
4. I selected the second partition(s), which were completely unused, and then told GParted to delete them.
5. I then told GParted to apply my changes by clicking the green check mark.

After that, I was able to install Ubuntu. When I got to the screen to choose how to install it, I chose Install Ubuntu alongside Windows and Continue was no longer grayed out.

I went on to have other issues that I am still trying to figure out, but I won't discuss them here.