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Attempting install of 18x or 16x on old Mac Pro results in bizarre glitchy screen


Installtion Nightmare on iMacHow to EFI install Ubuntu?Ubuntu 14.04 single install not booting Mac Pro 4.1Will BIOS boot mode Ubuntu install be able to boot when firmware “Fast Boot” is “Ultra Fast”?Attempting to re-install ubuntu results in blank gray screenUbuntu Install Flashing DotMacBookPro External Ubuntu Boot issueNewly installed 18.04 won't bootFailing to install Ubuntu on an old Maclinux for very old Mac book






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1















I’ve tried the network, desktop, and server install images for 18.10, 18.04, and 16.04. All of them display the grub menu correctly, but display a flashing screen of random characters when any option is selected, as seen below



https://i.stack.imgur.com/TAsFE.jpg



I’m using a non-EFI graphics card, but as far as I know, that’s only an issue before the boot media is selected.










share|improve this question









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    1















    I’ve tried the network, desktop, and server install images for 18.10, 18.04, and 16.04. All of them display the grub menu correctly, but display a flashing screen of random characters when any option is selected, as seen below



    https://i.stack.imgur.com/TAsFE.jpg



    I’m using a non-EFI graphics card, but as far as I know, that’s only an issue before the boot media is selected.










    share|improve this question









    New contributor




    Noah B. Johnson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      1












      1








      1








      I’ve tried the network, desktop, and server install images for 18.10, 18.04, and 16.04. All of them display the grub menu correctly, but display a flashing screen of random characters when any option is selected, as seen below



      https://i.stack.imgur.com/TAsFE.jpg



      I’m using a non-EFI graphics card, but as far as I know, that’s only an issue before the boot media is selected.










      share|improve this question









      New contributor




      Noah B. Johnson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      I’ve tried the network, desktop, and server install images for 18.10, 18.04, and 16.04. All of them display the grub menu correctly, but display a flashing screen of random characters when any option is selected, as seen below



      https://i.stack.imgur.com/TAsFE.jpg



      I’m using a non-EFI graphics card, but as far as I know, that’s only an issue before the boot media is selected.







      system-installation mac grub-efi






      share|improve this question









      New contributor




      Noah B. Johnson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      Noah B. Johnson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited 1 hour ago









      Terrance

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      20.4k34898






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      asked 1 hour ago









      Noah B. JohnsonNoah B. Johnson

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