Dell latitude 5400 boots to a black screen without cursor

[megavolt]

While reading the boot.0.log i saw this:

ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored

The linux ACPI always tells the firmware that it is windows, but there is code on the firmware that supports linux. Here it becomes ignored, but to work well, some systems need this. To enable this you could add:

acpi_osi=Linux

to the kernel parameters in grub: Kernel parameters - ArchWiki

Have look here at the acpi section: [HowTo] Power savings setup| 2021-01-25

@shadab360

1. manjaro-chroot -a

==> ERROR: You can't mount 0!

That’s the reason why i said:

@megavolt

type manjaro-chroot -a into the terminal and type 1

and not 0