Brightness resets on computer restart

Bug #849091 reported by kidsforchrist on 2011-09-13
38
This bug affects 8 people
Affects Status Importance Assigned to Milestone
Ubuntu
Undecided
arun

Bug Description

When I restart or turn on the computer the brightness is set to 100 on the boot splash but when in the login screen it is set to the minimum. When logged in it is still minimum. When I change the brightness in the screen settings it will change the brightness but it will go back to minimum when the computer is shutdown or restarted. I will need to change the brightness in the Screen setting every time I restart my computer.

I use a HP G72 Notebook laptop

Ubuntu 11.10
64BIT

description: updated
tags: added: hw-specifc
Mark Russell (marrusl) wrote :

This describes precisely what happens to my laptop screen. Although it does not happen with my external display (over HDMI).

I have a System76 Pangolin Performance (panp7). Running the open "radeon" driver with a ATI HD4570 (iirc).

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in ubuntu:
status: New → Confirmed
Mark Russell (marrusl) on 2011-09-19
tags: removed: hw-specifc
metos (metos00) wrote :

same probleme on my laptop dell precision m4600 (ubuntu 11.10 64b) (with ati video card)

g.gr (2gr) wrote :

same problem on asus n53s, ubuntu 11.10 64bit

I've temporaly edited /etc/rc.local
with
echo 2 > /sys/class/backlight/acpi_video0/brightness

2 is the brightness set by default (choose between 0 - 10)

Mikolaj (mikolaj-babiak) wrote :

Similar problem on HP probook 6465b running Ubuntu 12.04. Screen brightness and brightess setting resets to max afeter every reboot. Also, even thought I've set the screen to be turned off after 3 min idling, it's not. It only fades to black, but you can still see that the backlight is working.

I have the same problem. This did not use to be the case when i was using Ubuntu 11.04. But since 11.10, its been like this. Also, the brightness control buttons do not work.

I use HP G72 B66US Laptop.

Samuel Wolf (samuel-wolf) wrote :

Ubuntu 12.04 x64, same problem.
Add echo 2 > /sys/class/backlight/acpi_video0/brightness to /etc/rc.local help for the moment.

Dan Dart (dandart) wrote :

This is a bug in usplash/plymouth's use of Intel's KMS (whichever the one that 12.10 uses).
Many other distros use this and this is becoming critical (people not being able to access their screens).

arun (arungpurohit) on 2015-11-17
Changed in ubuntu:
assignee: nobody → arun (arungpurohit)
arun (arungpurohit) wrote :

if u r using ubuntu os then run this code in terminal

sudo add-apt-repository ppa:nrbrtx/sysvinit-backlight

sudo apt-get update

sudo apt-get install sysvinit-backlight

arun (arungpurohit) wrote :

if u r using ubuntu os then run this code in terminal

sudo add-apt-repository ppa:nrbrtx/sysvinit-backlight

sudo apt-get update

sudo apt-get install sysvinit-backlight

The attachment "New Text Document.txt" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

tags: added: patch
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