Alright, I have an LG Optimus G that I'm playing around with and trying to install ubuntu on. I'm following this guide I've done everything up to the point where you enter this into the terminal:
$ adb reboot bootloader
Which just reboots the phone but not into the bootloader.
when I check for adb devices:
$ adb devices devices attached LG-LS970-9c07c856 device
And when I run
$ fastboot devices
I get nothing. Any idea how to fix this so that it will reboot into the bootloader?