Black screen and blinking underscore on Ubuntu Installation.

**baloo101** · September 1st, 2011

Hi, i have a problem. my internal Superdrive is broke, so I tried to install Ubuntu with an external DVD drive but it's not working… The versions I tried are, 10.04.3 (32 and 64) and 11.04 (32)

When I'm trying to install it, I got a black screen with a blink underscore and nothing happened.

I tried in FW400 and USB using external DVD, nothing
I tried to use de MacMini's of my friend as a target mode, same problem
I followed all steps here : http://www.ubuntu.com/download/ubuntu/download but nothing happened.
When I hold CMD si see what are de boot devices, I can see my CD with de name of Windows.
I also tried to boot on CD using rEFIt but nothing.

My MacBook is a 2,1 model with 2.0 ghz processor. I can mount my CD under OS X when I insert it into my external DVD drive

I saw this thread (http://ubuntuforums.org/showthread.php?t=1832848) but I don't have exactly the same problem as him so this is why I'm starting a new thread.

This a lot for your help and have a nice day.

**baloo101** · September 1st, 2011

Sorry, I did not present myself before asking this question... Can someone tell me where can I do this. Thanks.

**baloo101** · September 4th, 2011

Ok, I tried de CD's ont other computer that is not a MacBook and it's working perfectly... Some one has any idea about this problem ?

**DoubleClicker** · September 5th, 2011

Do you get the blinking underscore before or after the the grub menu screen? If it's after then then see:

http://ubuntuforums.org/showthread.php?t=1754619

**baloo101** · September 5th, 2011

Originally Posted by DoubleClicker

Do you get the blinking underscore before or after the the grub menu screen? If it's after then then see:

http://ubuntuforums.org/showthread.php?t=1754619

Thks to help me DoubleClicker, I have the blinking underscore before all, so i didn't see the grub menu.

**DoubleClicker** · September 6th, 2011

Do you have the right version for your architecture?
A 64 bit CD won't boot on a 32 bit machine, and an an x86 disk won't boot on a PPC.

If you've verified that you have the right disk for your architecture, and still have the problem, then it means the problem is that your CDRom drive can't read your LiveCD. Either you have a hardware problem with the drive, or the Disk is slightly damage, in a way that Your CDRom can't be read in your the disk, but other machines can.