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czg

Member

Registered: 2023-03-19

Posts: 13

more clear difference between acpi_backlight option parameters

I tried different config with acpi_backlight option in '/etc/default/grub'
'/etc/default/grub'

....
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodest noresume text pcie_aspm=off acpi_backlight=none"
....

my nvidia driver version and monitor is LCD

$ nvidia-smi --query-gpu=driver_version --format=csv
driver_version
525.85.05
$ hwinfo --monitor --short
monitor:                                                        
                       BOE CQ LCD Monitor

here none/vendor/native can make

ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GP17.VGA.LCD._BCM.AFN7]

error in boot log disappear, and then I can use Fn+F6 to modify brightness

in this link, 'video' is to be compatible with integrated gpu, so maybe not work with nvidia,

So how do I know my exact vendor
and what exact difference between native and vendor
And
based on this

$ ls /sys/class/backlight/
nvidia_0

does this means acpi is substituted by nvidia in regard to backlight.

Last edited by czg (2023-03-19 07:51:34)