Ubuntu 13.10 installer/live fails to boot from DVD/USB on UEFI
Solution 1:
A user posted this in the forum who had a P50.
Turned NIC (Integrated Network Interface Controller) off and then booted off of USB. Was NOT an issue with any Linux distro just a quirk of the laptop. Am now running 13.10 daily and everything works. Also had to stick with EFI boot ON, Secure Boot disabled. Wouldn't boot off of any media or HDD when mode set to CSM.
http://ubuntuforums.org/showthread.php?t=2163854
Another user with P75
Toshiba Satellite P75 intel hd 4600 needed both:
acpi_osi=Linux acpi_backlight=vendor