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?
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Same here. cannot change brightness with Fn + arrow keys.– StannOct 29, 2011 at 17:46
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Have you solved this issue?– pl1nkJun 27, 2012 at 22:26
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9 Answers
Package name is xfce4-power-manager-plugins. Solved my brightness problem in xubuntu 10.04.2.
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2
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echo 1 | sudo tee /sys/class/backlight/acpi_video0/brightness
You can change:
- Brightness from 1 to 10.
- acpi_video0 or acpi_video1
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1I'm extrremely new to xubuntu, and I was wondering if it could be possible to assign this command to a shortcut key?– JiskyaNov 2, 2012 at 20:41
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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.
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After installing additional power manager package I could add a brightness applet to the panel Feb 7, 2012 at 10:39
- 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
answered Dec 20, 2019 at 6:17
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.
answered Oct 26, 2011 at 0:11
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, 2012 at 17:09
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.
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.
You can use xgamma. The default value is 1.0, higher is brighter, lower is darker.
Example xgamma -gamma 0.9.
answered Oct 25, 2011 at 23:22
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not looking to change the gamma, i want to change the backlight brightness Oct 27, 2011 at 18:27