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I have a 2011 iMac that I wanted to use with Ubuntu. When booting the installer from a USB/SD card, it would always crash on the normal installer. Screen just went black. So I tried the "Safe Graphics" mode or whatever it was called.

Installation went great. Detected my WiFi, etc.

Now that installation is complete, the computer won't boot. I only get a black screen. Not sure why the "safe mode" worked and not the normal mode. And, I tried holding down the left shift to boot into safe mode again but nothing but black screen.

Any idea what I can do? I'm using the newest version of Ubuntu, btw.

Thanks.

UPDATE

I booted into the installer again but this time, I choose Try Ubuntu. Also, I have to select "safe graphics". But everything works as long as I use Safe Graphics. How can I always use this mode?

cbmeeks
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  • Are you able to boot into your bios, or is the screen black at post? – guttermonk Jul 13 '20 at 01:25
  • This is a Mac. No BIOS (that I know of) to boot into. – cbmeeks Jul 13 '20 at 01:30
  • Have you looked [here](https://askubuntu.com/questions/1138137/what-is-safe-graphics-mode)? That should get you sorted and explain what's going on. It's *nomodeset* that you're looking for. – KGIII Jul 13 '20 at 03:18
  • Yep, I found that. Then later I found a post that helped me out (see my answer). It's working now. Thanks. – cbmeeks Jul 13 '20 at 03:29

1 Answers1

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I figured it out with Christian's answer here: https://askubuntu.com/a/941322/144825

Basically, I had to boot off the Live CD and mount the installed Linux. Then, update the Grub config with nomodeset, etc.

cbmeeks
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