Live USB systemd-backlight@backlight:acpi_video0.service loaded failed

[anon89812132]

@maxemilian

acpi_video0.service loaded failed failed Load/Save Screen Backlight Brightness of backlight:acpi_video0

Please see

Booting shows two warnings

Yes, it should. I’ve had to do the same thing in the past and it worked.

aka, you have to manually add:

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_backlight=vendor"

or

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=\"Linux\""

or

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=\"!Windows 2012\""

or consult the How to Choose the Proper ACPI Kernel Argument