Grub Backlight Issue
Mon, 30 Dec 2024 12:04:03 -0500
This will be a quick one. I had an issue with my backlight in Void Linux. Shortly after updating my system, I rebooted my computer to find that my screen was slightly dimmer than usual. While this may seem to be fairly trivial, I was concerned that it could be the early symptoms of a hardware failure.
Hoping that it wasn't, I started looking for software problems. I first tried to increase the brightness with xrandr to no avail.
This thread had a solution that worked for me.
To solve this issue, open /etc/defaults/grub with a text editor, and update the following line.
GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_backlight=video"This variable passes options to the kernel for a normal boot, but does not define them if you need to boot in recovery mode.
Save this file and rebuild GRUB with the following command.
# update-grubFinally, reboot your system.