Unable to CD boot Ubuntu 14.04 on (new) Alienware 17. My guess is graphics card issue. AMD Radeon R9 M290X. Any advice? Thanks.
Try typing in
in the command line just below the menu asking if you want to Try Ubuntu without installing"... The focus of the cursor is already in the command line so back the cursor up before the
and type in the extra commands above. It forces the linux kernel framebuffer to load normal vga mode. I know I have seen a table of all the available values you can specify for vga mode but I cannot remember where I saw it. Setting it to "normal" worked for me when all other settings did not. Upon more research the nomodeset does this:
Adding the nomodeset parameter instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded.
So use both. I found after much digging that this was a graphics issue.
-Steve (noob Ubuntu user)