How to lower brightness in Linux to eliminate whining?
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How to lower brightness in Linux to eliminate whining?
I've read https://www.silentpcreview.com/stop_lcd_whine
It works for my monitor, but it's too bright. How can I lower brightness in Linux? I use Intel integrated graphics.
It works for my monitor, but it's too bright. How can I lower brightness in Linux? I use Intel integrated graphics.
Re: How to lower brightness in Linux to eliminate whining?
Depends upon your distro but Arch has a fairly thorough Wiki page as always:
https://wiki.archlinux.org/index.php/backlight
It refers to a tool called xorg-xbacklight which can be run from the shell amongst other places:
https://wiki.archlinux.org/index.php/backlight
It refers to a tool called xorg-xbacklight which can be run from the shell amongst other places:
Code: Select all
$ xbacklight -set 50
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Re: How to lower brightness in Linux to eliminate whining?
Any idea how to do this on Debian 9 with GNOME?
There's nothing in /sys/class/backlight. There's no xorg.conf or xorg.conf.d in /etc/X11. Doing xbacklight -set 50 does nothing. Same if I put in /etc/X11/xorg.conf.
GNOME commands from https://wiki.archlinux.org/index.php/ba ... with_Gnome report these errors:
Error: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gsd_5fpower_5fmanager_5ferror.Code0: gsd-backlight-helper failed: Could not get or set the value of the backlight: No backlight devices present
and
Error: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gsd_5fpower_5fmanager_5ferror.Code0: Screen backlight not available
xcalib -co 40 -a results with Error - unsupported ramp size 0
I'm using an Ivy Bridge i3 and may be moving to Coffee Lake i3 soon.
There's nothing in /sys/class/backlight. There's no xorg.conf or xorg.conf.d in /etc/X11. Doing xbacklight -set 50 does nothing. Same if I put
Code: Select all
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "Backlight" "intel_backlight"
EndSection
GNOME commands from https://wiki.archlinux.org/index.php/ba ... with_Gnome report these errors:
Error: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gsd_5fpower_5fmanager_5ferror.Code0: gsd-backlight-helper failed: Could not get or set the value of the backlight: No backlight devices present
and
Error: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gsd_5fpower_5fmanager_5ferror.Code0: Screen backlight not available
xcalib -co 40 -a results with Error - unsupported ramp size 0
I'm using an Ivy Bridge i3 and may be moving to Coffee Lake i3 soon.
Last edited by resistante on Tue Apr 02, 2019 6:32 am, edited 1 time in total.
Re: How to lower brightness in Linux to eliminate whining?
Power draw does not bother you.
You want to adjust brightness. Not backlight.
https://www.ostechnix.com/how-to-adjust ... -in-linux/
You want to adjust brightness. Not backlight.
https://www.ostechnix.com/how-to-adjust ... -in-linux/
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- Posts: 34
- Joined: Wed Jan 24, 2018 6:28 am
Re: How to lower brightness in Linux to eliminate whining?
Klusu, this works pretty well, although it changes colors somewhat which isn't ideal and also completely doesn't cooperate with redshift (blue light reducer) which disables the brightness change every 5 seconds, if I run it in infinite loop it will just flash bright light at me every 5 seconds.
I wonder if that xbacklight thing wouldn't happen to be a better tool for this. I think this should be directly controled by GPU, so that the colors are right.
I wonder if that xbacklight thing wouldn't happen to be a better tool for this. I think this should be directly controled by GPU, so that the colors are right.
Re: How to lower brightness in Linux to eliminate whining?
It seems you WANT to adjust the backlight. You can't. The monitor does not have the hardware for that. The directory sys/class/backlight is empty because Linux has found nothing it could put in there. Even if you could, you would get the same whine.
Re: How to lower brightness in Linux to eliminate whining?
I don't know how to do it with Intel, maybe xrandr or xbrightness/xbrightness-gui ?
http://shallowsky.com/blog/linux/x-brig ... randr.html
http://shallowsky.com/blog/linux/bright ... -in-x.html
http://shallowsky.com/blog/linux/x-brig ... randr.html
http://shallowsky.com/blog/linux/bright ... -in-x.html