I have a MacBook Pro in dual boot Mac OS X / Ubuntu 12.04 (Precise Pangolin).
When I boot it I have a rEFIt menu, and I can chose between Mac OS X and Linux.
A few days ago I have updated Mac OS X from 10.7 (Lion) to 10.8 (Mountain Lion) using a .dmg image provided by my company. Since then when I select Linux in rEFIt it says:
No bootable device --insert boot disk and press any key
I have tried going to rEFIt partitioning tool. This is what I got:
As suggested in Mac OSX Mavericks update rEFIT broken
I wanted to fix the issue the same way as AndrewM, but I don't have the option "MBR table must be updated".
Then I booted on Ubuntu 12.04 CD, chose repair broken system, chose root patition /dev/sda6 as this is where my Ubuntu file system is. I got a shell, but I don't really know how to repair the poblem since if it was just Windows dual boot. A GRUB update would solve the issue, but here I don't know where the GRUB 2 is installed.
Here are results from Parted, and it is a bit confusing for me as the Mac partition is the one with boot:
As you can see the entry 1 is an EFI system partition and is the boot partition, so I wonder if I should install GRUB there or in sda6, which is the Ubuntu filesystem.
I am not sure should I work on rEFIt shell or Ubuntu. Unfortunately, I don't remember where GRUB was before update.
UPDATE: using same link above I have tried RoundSparrow hilltx answer and installed rEFInd, but the result is same.... still no bootable device when I select Linux.
UPDATE 2: just used alternate CD again, mounted on /dev/sda6 and the ran update-grub.
It seemed to wok and started listing all my kernels. But after rebooting several times still no bootable device when I select Linux in rEFInd.
UDATE 3: Have tried to boot from Ubuntu cd and select "boot from first available filesystem. I got error and dropped to grub rescue shell. I even followed the indications on this link but was unable to boot as I tried to use sdb6 but no luck
UPDATE 4 as per Rob Smith request here is out put from ls -l $(find /EFI -iname "*.efi")
*MACOSX
-rw-r--r--@ 1 root admin 55048 29 oct 17:44 /EFI/refind/drivers_x64/btrfs_x64.efi
-rw-r--r--@ 1 root admin 38888 29 oct 17:44 /EFI/refind/drivers_x64/ext2_x64.efi
-rw-r--r--@ 1 root admin 39304 29 oct 17:44 /EFI/refind/drivers_x64/ext4_x64.efi
-rw-r--r--@ 1 root admin 43432 29 oct 17:44 /EFI/refind/drivers_x64/hfs_x64.efi
-rw-r--r--@ 1 root admin 38984 29 oct 17:44 /EFI/refind/drivers_x64/iso9660_x64.efi
-rw-r--r--@ 1 root admin 43656 29 oct 17:44 /EFI/refind/drivers_x64/reiserfs_x64.efi
-rw-r--r--@ 1 root admin 175016 29 oct 17:44 /EFI/refind/refind_x64.efi
-rw-rw-r-- 1 root admin 73232 7 mar 2010 /EFI/tools/dbounce.efi
-rw-rw-r-- 1 root admin 763248 7 mar 2010 /EFI/tools/dhclient.efi
-rw-rw-r-- 1 root admin 67024 7 mar 2010 /EFI/tools/drawbox.efi
-rw-rw-r-- 1 root admin 71312 7 mar 2010 /EFI/tools/dumpfv.efi
-rw-rw-r-- 1 root admin 84848 7 mar 2010 /EFI/tools/dumpprot.efi
-rw-rw-r-- 1 root admin 472912 7 mar 2010 /EFI/tools/ed.efi
-rw-rw-r-- 1 root admin 143856 7 mar 2010 /EFI/tools/edit.efi
-rw-rw-r-- 1 root admin 1801008 7 mar 2010 /EFI/tools/ftp.efi
-rw-r--r--@ 1 root admin 47848 29 oct 17:44 /EFI/tools/gptsync_x64.efi
-rw-rw-r-- 1 root admin 320560 7 mar 2010 /EFI/tools/hexdump.efi
-rw-rw-r-- 1 root admin 286384 7 mar 2010 /EFI/tools/hostname.efi
-rw-rw-r-- 1 root admin 534416 7 mar 2010 /EFI/tools/ifconfig.efi
-rw-rw-r-- 1 root admin 395344 7 mar 2010 /EFI/tools/loadarg.efi
-rw-rw-r-- 1 root admin 587408 7 mar 2010 /EFI/tools/ping.efi
-rw-rw-r-- 1 root admin 730416 7 mar 2010 /EFI/tools/pppd.efi
-rw-rw-r-- 1 root admin 561360 7 mar 2010 /EFI/tools/route.efi
-rw-rw-r-- 1 root admin 1961712 7 mar 2010 /EFI/tools/shell.efi
-rw-rw-r-- 1 root admin 750224 7 mar 2010 /EFI/tools/tcpipv4.efi
-rw-rw-r-- 1 root admin 4048 7 mar 2010 /EFI/tools/textmode.efi
-rw-rw-r-- 1 root admin 320656 7 mar 2010 /EFI/tools/which.efi
*LINUX
