Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I dual-booted my Mac with Ubuntu and it was running fine, I wen't out the office but continued to use it via VNC just to set up my environment, this obviously caused a lot of updates that wanted me to restart my computer (Something I couldn't do as it would boot straight into mac unless someone selected Linux on ReFit). Then there was a power outage causing it to be shut-off one day, I came back into the office today to find that it refuses to boot, I just get a black screen with a flashing white cursor, it does boot into the Mac no problem, any solutions?

edit mac partition Inspector:

* Report for internal hard disk *

Current GPT partition table: # Start LBA End LBA Type 1 40 409639 EFI System (FAT) 2 409640 212872855 Mac OS X HFS+ 3 212873216 1894903807 Basic Data 4 1894903808 1953262983 Linux Swap

Current MBR partition table: # A Start LBA End LBA Type 1 1 409639 ee EFI Protective 2 409640 212872855 af Mac OS X HFS+ 3 * 212873216 1894903807 83 Linux 4 1894903808 1953262983 82 Linux swap / Solaris

MBR contents: Boot Code: GRUB

Partition at LBA 40: Boot Code: None (Non-system disk message) File System: FAT32 Listed in GPT as partition 1, type EFI System (FAT)

Partition at LBA 409640: Boot Code: GRUB File System: HFS Extended (HFS+) Listed in GPT as partition 2, type Mac OS X HFS+ Listed in MBR as partition 2, type af Mac OS X HFS+

Partition at LBA 212873216: Boot Code: GRUB File System: ext4 Listed in GPT as partition 3, type Basic Data Listed in MBR as partition 3, type 83 Linux, active

Partition at LBA 1894903808: Boot Code: None File System: Unknown Listed in GPT as partition 4, type Linux Swap Listed in MBR as partition 4, type 82 Linux swap / Solaris

Edit Edit:

It seems to not even get into the Grub loader, as pressing Shift does nothing, I select Linux from rEFit then it goes straight to a black screen with a flashing text input cursor, I can do nothing, only restart and do it all again.

share|improve this question

First of all I recommend you to be sure, that your linux partition works fine. I think, you can check it under your MacOS. If no - get the Ubuntu LiveCD\USB and try access root partition, boot folder (/boot partitaion, if divided). If all seems to be working right you have to check your bootloader settings.

You also can try boot manually to your system from Live distributive with GRUB. You have to enter GRUB console mode, select your root device, kernel file and process booting

share|improve this answer
@MattC Please edit your question to include that information there, rather than a comment. – user98085 Jan 21 '13 at 11:22
Once I get into the options in the LiveCD, how would I manually boot the GRUB? I am able to launch Ubuntu from the CD. – Matt C Jan 21 '13 at 11:41

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.