Dualboot ML / Ubuntu 12.10 - not showing up in Chimera

[nylki]

Hi there,
I followed rehabmans guide ( http://racerrehabman.wordpress.com/...indows-8-mac-os-x-lion-and-ubuntu-multi-boot/ ), to do a dualboot. In my case it shall be a Mountain Lion + Ubuntu 12.10 dualboot on _one_ SSD.

The Installation itself worked, I can boot Ubuntu now, when I access the Motherboards Boot Options (F12) and select my ubuntu partition.
But when I choose to boot from my SSD, Chimera will only list Mountain Lion, not Ubuntu.

I did set the partition to install grub to the Ubuntu root directory.
I already tried reinstall Chimera, it didnt work.

Now, as I am not using some MBT/GPT Hybrid Partition scheme, only GUID/GPT, might there be any differences I could have overlooked?

I don't think I missed any step.


Do you have any Idea what might be the cause that I can't see Ubuntu in Chimera after the steps, and only be able to boot via the Motherboard/EFI Boot menu?

 

[RehabMan]

Hi there,
I followed rehabmans guide ( http://racerrehabman.wordpress.com/...indows-8-mac-os-x-lion-and-ubuntu-multi-boot/ ), to do a dualboot. In my case it shall be a Mountain Lion + Ubuntu 12.10 dualboot on _one_ SSD.

The Installation itself worked, I can boot Ubuntu now, when I access the Motherboards Boot Options (F12) and select my ubuntu partition.
But when I choose to boot from my SSD, Chimera will only list Mountain Lion, not Ubuntu.

I did set the partition to install grub to the Ubuntu root directory.
I already tried reinstall Chimera, it didnt work.

Now, as I am not using some MBT/GPT Hybrid Partition scheme, only GUID/GPT, might there be any differences I could have overlooked?

I don't think I missed any step.


Do you have any Idea what might be the cause that I can't see Ubuntu in Chimera after the steps, and only be able to boot via the Motherboard/EFI Boot menu?

I wonder if you installed Ubuntu in some kind of UEFI-only mode? I think Chimera can only boot BIOS mode stuff, not UEFI mode (except for OS X, of course).

 

[nylki]

thanks for your reply!

Ah, that might be a possibility.
I don't know, i think Ubuntu automatically does the UEFI install these days automatically (since 12.10).
Atleast I did not see an option to choose between BIOS or UEFI install.

I suspect, according to this Ubuntu page: https://help.ubuntu.com/community/UEFI#Identifying_if_the_computer_boots_the_HDD_in_EFI_mode
it might be affected how the USB-stick is booted, legacy or UEFI.

Now that I deleted everything to start from scratch,
I try to get Ubuntu to install in legacy mode (by changing boot parameters), and checking (using the linked pages tips) dunno if it will work.
Another info is linked there: Converting_Ubuntu_into_Legacy_mode -> https://help.ubuntu.com/community/UEFI#Converting_Ubuntu_into_Legacy_mode

If it fails I might try this.


If all of the above fails, I guess I have to stick with the old solution (switch booting ubuntu and OSX via Mainboard Boot argument)
or installing plain good old debian



In any case, I will report how it turned out.

thanks!

 

[RehabMan]

thanks for your reply!

Ah, that might be a possibility.
I don't know, i think Ubuntu automatically does the UEFI install these days automatically (since 12.10).
Atleast I did not see an option to choose between BIOS or UEFI install.

I suspect, according to this Ubuntu page: https://help.ubuntu.com/community/UEFI#Identifying_if_the_computer_boots_the_HDD_in_EFI_mode
it might be affected how the USB-stick is booted, legacy or UEFI.

Now that I deleted everything to start from scratch,
I try to get Ubuntu to install in legacy mode (by changing boot parameters), and checking (using the linked pages tips) dunno if it will work.
Another info is linked there: Converting_Ubuntu_into_Legacy_mode -> https://help.ubuntu.com/community/UEFI#Converting_Ubuntu_into_Legacy_mode

If it fails I might try this.


If all of the above fails, I guess I have to stick with the old solution (switch booting ubuntu and OSX via Mainboard Boot argument)
or installing plain good old debian



In any case, I will report how it turned out.

thanks!

FWIW, I have Ubuntu 12.10 installed on my desktop, booting from Chimera (must be Legacy/BIOS boot). I installed Ubuntu from USB key, and probably had UEFI disabled in BIOS at the time, so the Ubuntu installer would have been booted Legacy...

 

[nylki]

FWIW, I have Ubuntu 12.10 installed on my desktop, booting from Chimera (must be Legacy/BIOS boot). I installed Ubuntu from USB key, and probably had UEFI disabled in BIOS at the time, so the Ubuntu installer would have been booted Legacy...

Ah ok. So practically it should work.

I tried to boot it in BIOS/Legacy mode, but strangely I can't boot the Ubuntu 12.10 flash drive via BIOS/Legacy, it tells me to insert a proper boot/installation (cant remember) medium or to restart.
Only when I choose to use uefi to boot the flash drive, it does start grub and then the liveCD. Dunno why, it appears i can boot the ubuntu flash drive only in UEFI mode.

Actually it is an Ubuntu Gnome Remix USB Drive, but I don't think they messed with the bootloader stuff, so it should act like a normal Ubuntu at boot time.
I'll experiment a bit more, with a regular ubuntu, debian might aswell with fedora.

But probably not today anymore, got alot other stuff to do aswell :/


PS: I have a Gigabyte Z77-DS3H.