From the issues i usually spot about Calamares (Manjaro’s installer), failure to write on the drive usually makes an error appear… Maybe in your case, the hardware simply faked the output by returning a success when it should have returned a failure.
It may be worth checking your BIOS settings for compatibility with Manjaro:
Due to the size of the ISO, the read speed of a DVD drive and the way a Manjaro ISO is constructed by using 4 overlay filesystems - booting from a DVD drive is known to be a very bad experience.
Use an USB stick big enough to hold the iso-file - use ventoy to make it bootable - then copy the ISO to the USB - no burning - drag’n drop the ISO onto the USB.
When your system doesn’t recognize Manjaro - then you have a system supporting EFI but prioritising MBR boot - thus your Mint is MBR and Manjaro is EFI - which is entirely possible but you cannot mix the two into a bootloader menu.
You will have to choose from your firmware bootoverride menu - accessible by pressing a function key during boot - F12 on a Dell system.
I wanted to use Manjaro because I like KDE best. I also downloaded Kubuntu and it will NOT install.
This laptop has been a BIG pain in my arse!! I’ve tried other distros as well and the ONLY distro that installs and runs is MINT.
Before this back up your data in home partition to external hard drive.
First Erase USB drive and format as GPT ( If UEFI Install ). Then burn image to USB using dd or whatever. Boot into live environment - and format sda to GPT using KDE Partition manager( for UEFI Install). Then during Manual Partition - select 300 MiB as EFI file system ( flag as boot). Then Root(format) , Swap and Home partition as necessary ( ext4 or brtfs or other filesystem as per your choice ). grub install to efi partition. Finalize partitions, passwords and install. Reboot
I tried several times to post the output of the Konsole from your commands, though it says I cannot post any links. There are NO links… but it assumes there are anyway. So I cannot post the output.
Plus, I can’t seem to get the right trackpad menu to appear. I checked the settings and it is set to click the lower right corner of the trackpad and the drop down menu should appear, though it does Not.
I don’t know how to use it. I looked it up on a couple of sites and no one really explains it very well.
Anyway… I ran this OS live for a bit and found that it’s not really my cup of tea. There are several things I came across that I didn’t like. Plus, the repository doesn’t have a few of the programs I use, like Brave. It also does not use my trackpad fully. Like right click does not work.
So, I think I will now move on. Thanks anyway for the info you all shared!