Unable to Adjust Screen Brightness on Asus UL50VT Laptop

Hardware Support
1

Hello, I am using an old asus laptop that has been a bit of a project in terms of reawakening in the modern world. I first used this laptop with Linux Mint when I was starting off with Linux, but one issue that seems to have persisted with both Linux Mint and ZorinOS is that the brightness slider and the fn+f5 and fn+f6 don't do anything with the brightness, the slider appears to react and change, but the screen remains the same.

I was just trying a few of the suggestions from this post and none of them seemed to work for me: Unable to adjust display brightness - #4 by LazyBucket

2

Managed to fix it with this method:

Typing this in the terminal

sudo nano /etc/default/grub

Then replacing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" with GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force acpi_backlight=native"

Press ctrl+x to exit, then the y key to say Yes to Save, then the enter key to save as current configuration. The terminal will revert to normal.
Next, update grub:

sudo update-grub

Then I restarted and the slider finally was having an effect on the screen brightness.

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