Changing screen brightness

Question

I have a hp pavilion dv6 with xubuntu installed. however there isn't a way to change the screen brightness, i tried the fn plus scroll keys to no avail, any ideas?

score 11 · Answer 1 · answered Dec 26 '11 at 21:15

11

Package name is xfce4-power-manager-plugins. Solved my brightness problem in xubuntu 10.04.2.

answered Dec 26 '11 at 21:15

skorzen

149

score 7 · Answer 2 · answered Jan 24 '12 at 08:00

7

echo 1 | sudo tee /sys/class/backlight/acpi_video0/brightness

You can change:

Brightness from 1 to 10.
acpi_video0 or acpi_video1

answered Jan 24 '12 at 08:00

kholis

743

score 2 · Answer 3 · answered Oct 27 '11 at 19:09

2

XFCE has a panel applet for changing brightness, I don't remember if it's installed, so search in packages (e.g. in synaptic) for XFCE and brightness. Then right-click on the panel to add it.

answered Oct 27 '11 at 19:09

Borsook

2,083

score 1 · Answer 4 · answered Dec 20 '19 at 06:17

Open your terminal
Type sudo apt-get install xfce4-power-manager-plugins
Enter your password and press y key to continue
Right-click on the panel, Panel-> Panel Preferences...
Come to the Items tab, click on Add new items button (+) and search for Power Manager Plugin
Select it and click on the Add button

score 0 · Answer 5 · answered Sep 22 '12 at 17:09

0

I had this problem, i unchecked "Power Manager" from "Application Autostart" list in Settings -> Session and Startup and added another application with this command xfce4-power-manager --no-daemon then i have not have this problem yet.

answered Sep 22 '12 at 17:09

Saeed Zarinfam

17,872

score 0 · Answer 6 · edited Apr 13 '17 at 12:25

0

I've had this problem as well.

What fixed it for me was adding acpi_backlight=vendor to the kernel boot line. For more information see Brightness not working on an HP Pavilion Dv6 with a ATI Radeon HD6770M.

After doing this, I could change my brightness normally using the F2 and F3 keys.

edited Apr 13 '17 at 12:25

Community

1

answered Sep 22 '12 at 17:13

cg505

501
1
4
15

score 0 · Answer 7 · answered Dec 13 '12 at 14:47

What worked for me was modifying the /etc/default/grub file.

Change the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

Then in a terminal sudo update-grub and reboot.

More info here.

score 0 · Answer 8 · answered Oct 26 '11 at 00:11

You need to download the following files in /etc/acpi/ directory

Download video_brightnessup.sh from here

Download video_brightnessdown.sh from here

After replacing these scripts

No reboot or logout required, simply press your function combination on your laptop to change brightness. Try to press FN + Up/Down Arrow.

score -1 · Answer 9 · answered Oct 25 '11 at 23:22

-1

You can use xgamma. The default value is 1.0, higher is brighter, lower is darker.

Example xgamma -gamma 0.9.

answered Oct 25 '11 at 23:22

Anonymous

11,979

Changing screen brightness

9 Answers9