Booting Ubuntu installed on SSD on both Windows and Mac












0















I've been struggling for a bit on this. I've installed Ubuntu on my external SSD with the following Partition:




  • 200MB EFI boot partition

  • 1GB ext2, mount to /boot

  • Swap

  • Ext4


I did the installation from my Windows machine and it works.



Now, I want to run Ubuntu on both my Mac and Windows, but I am struggling to get Ubuntu to load on the Mac. I installed reFind on my SSD. However, when I load Ubuntu I keep getting this:



"a start job is running for dev-disk-by x2duuid"



Any idea on how I can get past this?



Thanks for the help!










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  • 1





    Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

    – oldfred
    Jan 13 at 4:32


















0















I've been struggling for a bit on this. I've installed Ubuntu on my external SSD with the following Partition:




  • 200MB EFI boot partition

  • 1GB ext2, mount to /boot

  • Swap

  • Ext4


I did the installation from my Windows machine and it works.



Now, I want to run Ubuntu on both my Mac and Windows, but I am struggling to get Ubuntu to load on the Mac. I installed reFind on my SSD. However, when I load Ubuntu I keep getting this:



"a start job is running for dev-disk-by x2duuid"



Any idea on how I can get past this?



Thanks for the help!










share|improve this question


















  • 1





    Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

    – oldfred
    Jan 13 at 4:32
















0












0








0








I've been struggling for a bit on this. I've installed Ubuntu on my external SSD with the following Partition:




  • 200MB EFI boot partition

  • 1GB ext2, mount to /boot

  • Swap

  • Ext4


I did the installation from my Windows machine and it works.



Now, I want to run Ubuntu on both my Mac and Windows, but I am struggling to get Ubuntu to load on the Mac. I installed reFind on my SSD. However, when I load Ubuntu I keep getting this:



"a start job is running for dev-disk-by x2duuid"



Any idea on how I can get past this?



Thanks for the help!










share|improve this question














I've been struggling for a bit on this. I've installed Ubuntu on my external SSD with the following Partition:




  • 200MB EFI boot partition

  • 1GB ext2, mount to /boot

  • Swap

  • Ext4


I did the installation from my Windows machine and it works.



Now, I want to run Ubuntu on both my Mac and Windows, but I am struggling to get Ubuntu to load on the Mac. I installed reFind on my SSD. However, when I load Ubuntu I keep getting this:



"a start job is running for dev-disk-by x2duuid"



Any idea on how I can get past this?



Thanks for the help!







boot dual-boot grub2 partitioning uefi






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share|improve this question











share|improve this question




share|improve this question










asked Jan 13 at 4:24









Omar IsmailOmar Ismail

1




1








  • 1





    Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

    – oldfred
    Jan 13 at 4:32
















  • 1





    Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

    – oldfred
    Jan 13 at 4:32










1




1





Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

– oldfred
Jan 13 at 4:32







Did you copy /EFI/ubuntu from PC's internal drive to external SSD's ESP - efi system partition. You have to copy twice, once to /EFI/ubuntu & again to /EFI/Boot and rename shimx64.efi to bootx64.efi. That is because UEFI only boots from /EFI/Boot/bootx64.efi on external drives, but copy of shim or grub expects more files in /EFI/ubuntu. It probably only works on PC as you have installed grub to internal drive.

– oldfred
Jan 13 at 4:32












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