Score:0

LG Gram laptop keyboard backlight refuses to work

gh flag

Title pretty much. I've tried reloading the kernel module, I've tried xset led 3, I've tried using brightnessctl, nothing works. It's not a hardware issue, since in windows 10 it works just fine, and sometimes on bootup it'll turn on for a few seconds and then turn off again before booting into Ubuntu. Any help would be appreciated. I'm running Ubuntu 23.04, kernel version 6.2.0-23-generic (64bit), and my laptop's model number is 14T90N.

cn flag
I have zero problems with an LG 17" and an LG 16". Everything works out of the box. Same kernel. Is your ACPI active or did you disable it? `ls /sys/class/backlight/` should have `intel_backlight`. Does `/sys/class/backlight/intel_backlight` exist? "It's not a hardware issue" it is an BIOS+ACPI versus kernel issue. Try to boot with one of these `acpi_backlight=video`, `acpi_backlight=vendor`, `acpi_backlight=native`
Dee Garrin avatar
gh flag
intel_backlight is present in the backlight class. Trying the 3 acpi_backlight commands in startup options in grub didn't fix it.
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