The LED light that turns on when I press the mute button on or off, respectively, does not turn on in Ubuntu, yet turns on in Xubuntu. If anyone has any knowledge or help please lemme know!
Btw, this is a Lenovo w520 laptop!
EDIT:
The light doesn't turn on, it's strictly a cosmetic effect, but a nice one!
I was unaware that this question never got answered, or that it has been so long, and I just recently (about an hour ago) found the culprit and it was rather simple, I had to remove a couple lines from my /etc/default/grub file that redirected what the ACPI did and now this is working great!
I had to change the grub cmdline default from this:
grub_cmdline_linux_default= "quiet splash acpi_backlight=vendor acpi_osi=linux"
to this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
I found that by removing the acpi_osi = linux line allowed the LED to work, and removing acpi_backlight=vendor allowed me to change the laptop brightness using the slider under brightness and lock. The latter was a separate issue that made me figure out the former.
I deeply apologize for the extreme delay in response as for some reason I neglected to get notifications for this question.
