Black screen after installing on iMac late 2009

Hardware Support
1

I had to try Zorin with safe graphics. It booted just fine and I was able to mess around with it.

So I clicked the install option, and even used the option to download updates during the installation.

Once everything finished, and I was prompted to remove my thumbdrive, it eventually arrives a what appears to be a small underscore cursor, followed by the Zorin logo a few seconds later, and the a black screen which stays forever.

I've tried installing a couple of times, even without downloading the updates, but the same problem exists.

I'm guessing it's a video driver issue. According to this page it's has Radeon HD 4850 graphics.

How can I resolve this? Is there a driver I can install before the OS boots? Or even switch to safe graphics before it boots.

FYI I'm new to Linux.

2

before installing anything just login and edit GRUB

sudo nano /etc/default/grub

change a line to this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dc=1"

uodate GRUB

sudo update-grub

reboot and see

3

So I...

  1. Booted into live from USB
  2. Ran sudo nano /etc/default/grub and change the line to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dc=1" as mentioned.
  3. Saved the file.
  4. Ran sudo update-grub and got an error: failed to get canonical path of /cow.

What did I do wrong?

4

you can't upgrade GRUB in a live session and it's useless, you need to install Zorin in safe graphic first, and just after your first login try what I purposed

5

It might be worth a Try to open in Live Mode Nautilus, then go to ''Other Places'', choose the Drive of the Machine and then go to /etc/default/ on that Drive and open this in Terminal and then work on the File with sudo nano grub