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Questions tagged [xbacklight]

xbacklight - adjust backlight brightness using RandR extension where supported

Xbacklight is used to adjust the backlight brightness where supported. It finds all outputs on the X server supporting backlight brightness control and changes them all in the same way.

Source:Linux man page

28 questions
47
votes
7 answers

xbacklight: No outputs have backlight property - No /sys/class/backlight folder

I installed xbacklight, hoping that it would be able to control my brightness. When trying to change brightness, I was told "No outputs have backlight property". After looking around, I found that this has to do with my computer not having a…
Carter Roeser
  • 513
39
votes
5 answers

How do I set default display brightness?

Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% brightness every time.
Jeremy
  • 391
7
votes
1 answer

xbacklight -display XX?

I have two displays. I can successfully set brightness for the first display using e.g. xbacklight -set 30, but I cannot dim my second display connected to HDMI. I tried xbacklight -display HDMI1 -set 30, and xbacklight -display 1 -set 30, but I've…
max5555
  • 327
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  • 13
3
votes
1 answer

Xbacklight won't help to change brightness in lubuntu

I have an old acer laptop with following graphics hardware: 00:02.0 VGA compatible controller [0300]: Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller [8086:8108] (rev 07) Subsystem: Acer Incorporated [ALI] Device…
Ahmad Ali
  • 41
3
votes
2 answers

Is there an App that can make my desktop dimmer

I used an app in Windows 7, I think called dimmer to make the screen change its contrast settings so I could dim it lower than the controls of the PC defaults such as function key or the power options in control panel. Are there any of these type…
xtrchessreal
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  • 31
3
votes
1 answer

Cannot set brightness with xbacklight, Intel

This is similar to these two questions, but the solutions posted in each do not help me: xbacklight - No outputs have backlight property xbacklight: No outputs have backlight property - No /sys/class/backlight folder I just got a Dell XPS…
tremby
  • 439
2
votes
2 answers

i3wm, adjust brightness through command line

I've got a Precision 5510 running Ubuntu 16.10 with kernel 4.8.4. In unity, my function keys for brightness work correctly. But xbacklight commands don't do anything. xbacklight -get comes up empty. Is there a way to increase / decrease brightness…
ashic
  • 383
2
votes
0 answers

Mapping xbacklight to brightness keys?

The default method of changing the brightness doesn't work with the NVIDIA drivers, and xbacklight changes it. However, using the default mapper for keyboard shortcuts won't work for setting the F1 and F2 keys on my MacBook Pro. How do I set the…
arcetera
  • 107
2
votes
2 answers

Is it possible to run a command before log in screen?

How can I run: xbacklight -set 0 before login screen?
user171435
  • 21
2
votes
0 answers

xbacklight No outputs have backlight property

When I try running xbacklight -inc 10 I get an error message "No outputs have backlight property" I've searched the issue and found several answers usually suggesting some form of modifying /etc/X11/xorg.conf which I have previously done on this…
kalenpw
  • 754
2
votes
0 answers

Brightness changes are shown by the indicator but have no effect on the display (Lubuntu, Intel card)

I have tried many of the proposed solutions that I could find on the web, but any of them worked for me. I detail here my problem and some of the things that I tried: Relevant details: TOSHIBA NB200 Lubuntu 16.04 and 18.04 Output of ls…
Xavi
  • 121
2
votes
2 answers

How do I turn off backlight of keyboard?

I've tried xset led 3, xset led off, xbacklight -set 00, sudo find /sys/devices/platform/ -name leds returns nothing, so I couldn't try that. sudo find /sys/devices -name leds returns /sys/devices/pci0000\:00/0000\:00\:1c.5/0000\:3f\:00.0/leds, but…
Zane Hitchcox
  • 316
1
vote
2 answers

Adjust brightness from Terminal

I'm trying to edit the brightness of my System76 laptop screen from my window manager i3wm. I've tried the following: xbacklight -dec 10 does nothing sudo vim /sys/class/backlight/intel_backlight/brightness Even with sudo, and chmod 777 I can't…
Sauhaarda Chowdhuri
  • 141
1
vote
1 answer

Reduce CPU frequency in battery mode automatically

Is there any way to do that? Something like xbacklight and Cuttlefish
Daniyal Javani
  • 1,617
1
vote
1 answer

rc.local not executing command

I was trying to make my laptop running Ubuntu 13.10 remember the brightness from the last time and set it automatically on start-up. I was thinking about using xbacklight to set the brightness. So, as a test run I added xbacklight -set 100 inside…
ashik992
  • 171
1
2