Another black screen issue here. I thought I successfully installed Elementary on a mid-2010 iMac (after editing in grub to set nomodeset). It went through the install wizard and asked for my time zone and WiFi details. Then, it asked to reboot.

On reboot, I got two ding three ring sounds (not the Mac chime, nor beeps) and a completely black screen. I can’t seem to hold down opt/alt to boot from another drive anymore.

Any ideas on how to progress? My guess is that the graphics card driver doesn’t work.

If nothing else, I’d like to at least be able to boot from USB and put OS X back on.

2020-12-11 Update: After rebooting by unplugging, then plugging the iMac back in, I was able to get into GRUB by hitting Esc during the Mac chime. I guess I wasn’t properly rebooting.

Those ringing sounds from the video were actually ElementaryOS sounds! They’re the sound it makes when it picks up a wifi printer.

Now I have a problem with not being able to boot without recovery mode. Normal booting still takes me to a blank screen. However, if I go to GRUB during boot, pick recovery mode, then select Resume from there, it reboots in such a way that I actually get into a working instance of ElementaryOS! But if I reboot again from there, I go back to a black screen.

What’s the difference from a normal startup or reboot and a recovery mode reboot? How can I get normal startup to behave like the recovery mode reboot?

  • Try the shift button during boot to see if that gets you to the GRUB screen.
    – KGIII
    Dec 9, 2020 at 21:43
  • Same thing, unfortunately; nothing appears on the display.
    – Jim
    Dec 9, 2020 at 21:56
  • 1
    Searching tells me that 2 beeps is a RAM issue?!? I'd have no idea how to proceed from here. I'll toss a vote at your question to see if it attracts attention for you.
    – KGIII
    Dec 9, 2020 at 22:00
  • It's more of a ring sound, rather than a beep, if that helps. And there's three of them now that I listen closely.
    – Jim
    Dec 10, 2020 at 13:31
  • So, now I notice that if I leave it alone for a while, then hit the keyboard, it wakes up, then makes two ring sounds. Here’s a video: vimeo.com/489452378 Does this seem familiar?
    – Jim
    Dec 10, 2020 at 15:50


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