Can you try hitting ctrl or alt or F1 at that screen to access tty?
IF that works, enter in:
sudo apt remove --purge nvidia*
Then reboot...
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Yes none of those work, grub screen remains
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This... I did not expect.
What happens if you try it with safe graphics?
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Works okay (some freezing) if I select the usb in non UEFI mode, standard graphics. With safe graphics seems to work fine as well
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Is secure boot in your EFI settings enabled or disabled?
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Disabled
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I also tried using the keyboard in all of my possible usb slots with all other USB devices removed and that didn't work for the grub screen
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I will admit... I am a bit confused by that. Usually the black screen and blinking cursor is blank- Are you willing to use your phone to take a picture of that grub screen?
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I can't upload the picture due to file size limit, but it is literally a black screen with"GRUB _" and that is it. The underscore is flashing
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What happens if you tap the e key?
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No response
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Well, I wonder if adding nomodeset to grub is all you need. You may need a different Nvidia driver. But you must access the build in order to do either.
If you use the LiveUSB, you can mount the partition to update grub:
https://itectec.com/ubuntu/ubuntu-how-to-run-update-grub-from-a-livecd/
Following the above guide, before running sudo update-grub, you will need to run sudo nano /etc/defaul/grub
then add nomodeset behind "quiet splash" to make it "quiet splash nomodeset"
Then update-grub.
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I get failed to get canonical path of /cow on sudo update-grub
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That says it is trying to update-grub on the LiveUSB instead of on the mounted partition. Something went wrong.
Can you re-check your steps?
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I remounted everything and it says it worked, trying a restart
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Dang same screens, can't type anything from grub still
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Unless anyone else has any other suggestions... Since you are able to use the LiveUSB, I would run that to access your personal files and back them up if you have not already...
And suggest going ahead and reinstalling Zorin OS.
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Dang okay
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I have the same problem, I take a picture on my phone I can't send it here, but if I send it to my pc I can send it. This is weird AF
Maybe this is useful