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Tried the nomode set. When booting the usb-stick activity light never flashes after selecting something and the black screen comes up.

I am able to boot from a usb-stick with the os x lion...

I have a 8.2 MBP with a 1680x1050 screen and a 6490M graphics card. I'm trying to boot from a usb stick ubuntu live. I'm able to get to the ubuntu menu, asking to install or start live boot, but...

thanks for the input. Still haven't found a solution to the problem... I do get to the grub screen, which seems to be normally the hard part...

The video card is both an AMD 6490M and an intel HD3000. I tried all those options, still go the blank screen. Is there a way to get it to boot to just a terminal, and show all the booting...

I did try adding a
nomodeset after the "quiet splash --" in the boot line, so it was "quiet splash -- nomodeset", still had a blank screen though...

I never see the the purple screen with the keyboard logo, the screen just goes black/blank immediately after the grub screen. Unless I missed how to set options from the live cd grub screen.

I can't seem to boot from a live CD made on a USB stick or from a usb cd drive on my 15" 2011 MBP. Ether shows up at boot time, and both get to the grub menu to install or try without installing. ...