Score:0

How Do I Configure Ubuntu 21.04 so the Display's Backlight Goes Off when the Display is Locked

ph flag

I am running Ubuntu 21.04 LTS on a MacBookPro (5.3 model). The display's backlight does not go off when the computer is inactive (Apple Logo is always lit).

Configuration: I was getting a purple screen while booting, so I configured /etc/default/grub as follows:

GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=video nomodeset"
GRUB_CMDLINE_LINUX="noveau.modeset=0"

I also installed a current Nvidia driver:

sudo apt install Nvidia-driver-470 Nvidia-settings

Running OS X El Capitan and/or Catalina, the backlight goes out. Is it bad if the backlight is always on?

The graphics controller is an Nvidia GeForce 9400M. Is the nouveau driver in Nvidia-driver-470 the right driver for this GPU?

ChanganAuto avatar
us flag
Remove `nomodeset`.
dbl001 avatar
ph flag
Removed ‘nomodeset’ … Didn’t help.
mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.