Recently, I installed Kali Linux 2.0 as a third OS on my Dell Latitude E7240.
I used Unetbootin to make a bootable USB of Kali Linux. When I booted from it, it gave me options I wasn't used to. I chose Default the first time, and I was met with a black screen, so I manually shut my computer off, rebooted, and then chose Live Encrypted USB Persistence.
After a while of outputting stuff while booting which I did not understand at all, I finally got into a live session of Kali Linux 2.0. From there, I searched in the applications and found Install Kali, which I clicked.
I was given a graphical interface which removed the dash and bar at the top, and only showed me the installer, which was partially cut off. So, for I believe two things (one of which was configuring the network), I could not see any options, and blindly hit enter. However, I'm fairly certain nothing went wrong here, as the installation carried through smoothly and asked me mostly what I would expect to be asked while installing.
However, since I already have Ubuntu, the first time, I selected no for installing Grub, then it said I had to make my OS bootable and so I had to install something somewhere, so I just chose my hard drive,
/dev/sda, rather than entering the device manually, which I don't have any experience with. I finished the installation successfully, then rebooted.
My Ubuntu Grub loaded, but I didn't see Kali Linux. I tried following tutorials to add it to Grub, but had no luck. So, I reinstalled Kali, this time choosing to install Grub. Then I rebooted, and the Kali Grub showed up. However, now I get warnings when booting into Kali (Using Kali Linux) and when booting into Ubuntu.
This post is about booting into Ubuntu. When I boot into Ubuntu, I get the warnings shown in the following image:
EDIT2: New Image with more of the warnings (the warnings that flash for less than a second).
I don't think I have experienced any problems yet. However, just to be safe, I would like to know what this means. So what does that mean? If I am missing information, please tell me, and I will add it.
EDIT1: This all began AFTER I installed Kali Linux.