Dual Boot Issue

Paste in terminal (You can use right click)

pkexec nautilus

hit enter. A pop up window should appear asking for password. Enter y our password. Relay the results here.

$ pkexec nautilus
Unable to init server: Could not connect: Connection refused

Gtk-WARNING **: 00:29:29.914: cannot open display:

Apparently there is a polkit issue (Policy kit)
If you could, please log out, then where you normally log in, look around for a Gear Icon.
Click the Gear Icon to check what D.E. you are logging into and Make Sure you are not logging in on Wayland. Log in on Zorin OS Desktop.

Logged out no Gear Gap, logged into Zorin

The gear icon may appear by clicking the user account on Zorin Ultimate or Zorin Core before entering the password. Try clicking as if you were going to switch users on the login screen.

nothing

Searched for an image on net- this is an Ubuntu example, but GDM3 is the same.

okay found it, Shows in list view
Kodi
Kodi
. Zorin Desktop
Zorin Desktop on Wayland

Ok, please be sure it is set to Zorin Desktop NOT to "on Wayland."

Then log in and test your password in terminal by opening terminal and running

sudo apt update

~$ sudo apt update
[sudo] password for _______:
Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://ppa.launchpad.net/zorinos/apps/ubuntu bionic InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:5 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:6 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:7 https://packages.zorinos.com/stable bionic InRelease
Hit:8 http://ppa.launchpad.net/zorinos/drivers/ubuntu bionic InRelease
Hit:9 https://packages.zorinos.com/patches bionic InRelease
Hit:10 https://packages.zorinos.com/apps bionic InRelease
Hit:11 https://packages.zorinos.com/drivers bionic InRelease
Hit:12 http://ppa.launchpad.net/zorinos/patches/ubuntu bionic InRelease
Hit:13 https://packages.zorinos.com/premium bionic InRelease
Hit:14 http://ppa.launchpad.net/zorinos/stable/ubuntu bionic InRelease
Reading package lists… Done
Building dependency tree
Reading state information… Done
All packages are up to date.

Ok, good. This shows your password as Working.
Let's amend the instructions above and see if we can reduce the font size of grub menu.

I am going to set the font size at "12." You can change that to a different size you prefer... 8 or 10 or 14...
Just change each "12" in the script below if you wish to change that size, then enter it into terminal.

sudo grub-mkfont --output=/boot/grub/fonts/DejaVuSansMono12.pf2
–size=12 /usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf

sudo nano /etc/default/grub

Then arrow key down to an empty space and add this line into it there:

GRUB_FONT=/boot/grub/fonts/DejaVuSansMono12.pf2

Hit ctrl+x to exit. Then hit the y key to say yes to save it, then just hit the enter key to save it as the current name and configuration.
The terminal will revert to its normal appearance.
Now you must update the grub

sudo update-grub

[sudo] password for ______:
@

-___:

Refuses to accept password

In Terminal mode

Yet it showed everything was okay after when we did sudo apt update
Sorry getting tired, will have to wrap up for tonight, have doctors apt in morning, will check back tonight to see if anyone comes up with a solution, I want to thank you both for spending time with me trying to resolve this issue.

Agree completely. I will look over the above command and see if it is somehow causing the issue.

Thank you, goodnight, bfn.

Yes, this issue is extremely perplexing, and as such, had me curious as a cat. Helping you to find a solution would make me happy, and I’m sure, Aravisian as well.

I too am super tired, and I’m going to bed. Will catch back tomorrow. Also, I’m thankful you have another computer. When I was a kid, I only had 1 computer, when it went down, I was devastated.

Ok, I checked up on the first command for terminal that changes font and it is apparently now outdated according to the link I read as of 2020-12-06.

Perhaps changing the resolution might work:

GRUB_GFXMODE=1920x1080

Rather than the above. Run the command below to get to a root prompt.

sudo -i

Enter your password. Now run the grub-mkfont command on its own.

grub-mkfont --output=/boot/grub/fonts/DejaVuSansMono48.pf2
–size=48 /usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf

Also should it be --size=48 not -size=48?