freaking brightness and freebsd man panges.. not working....

userxbw

userxbw

I still have not fond a solution on how to control the irghtness on my laptop with freeBSD as it is right now my screen is way too dim, and laptop is plugged in to power and FBSD still dimmed my screen. I have not found anything workable on the internet concerning this issue.

Code: 
[userx@FreeBSD ~]$ su
Password:
[root@FreeBSD /home/userx]#  hw.acpi.video.lcd0.brightness
su: hw.acpi.video.lcd0.brightness: command not found
[root@FreeBSD /home/userx]# hw.acpi.video.lcd.levels
su: hw.acpi.video.lcd.levels: command not found
[root@FreeBSD /home/userx]# sysctls hw.acpi.video.lcd.levels
su: sysctls: command not found
[root@FreeBSD /home/userx]# sysctl hw.acpi.video.lcd.levels
sysctl: unknown oid 'hw.acpi.video.lcd.levels'
[root@FreeBSD /home/userx]# sysctl hw.acpi.video.ctr.levels
sysctl: unknown oid 'hw.acpi.video.ctr.levels'
[root@FreeBSD /home/userx]# sysctl hw.acpi.video.*.levels
sysctl: unknown oid 'hw.acpi.video.*.levels'
[root@FreeBSD /home/userx]# hw.acpi.video.lcd.brightness
su: hw.acpi.video.lcd.brightness: command not found
[root@FreeBSD /home/userx]# sysctl hw.acpi.video.lcd.brightness
sysctl: unknown oid 'hw.acpi.video.lcd.brightness'
[root@FreeBSD /home/userx]# sysctl hw.acpi.video.ctr.brightness
sysctl: unknown oid 'hw.acpi.video.ctr.brightness'

acpi_video(4)

www.freebsd.org www.freebsd.org

if this thing can control it on its own then there has to be a way to access it. all I've seen are people asking and getting to real solutions on the net.

--------- xbrightness ---- does not really work ----

it changed brightness sure,, then I unplugged laptop. screen went dim then I plugged it back in it did not get any brighter due to power souce and xbrightness did not reset it screen brightness. fail....
 
First of all make sure you have loaded acpi_video: sudo kldload acpi_video
In my case, the sysctl variables that control brightness level when plugged or unplugged are called hw.acpi.video.lcd0.economy and hw.acpi.video.lcd0.fullpower
So you can try something like this:
sudo sysctl hw.acpi.video.lcd0.economy=100
and see if that works. If so, add the line:
Code: 
hw.acpi.video.lcd0.economy=100
to your /etc/sysctl.conf to make it permanent.
 
patovm04 said:
First of all make sure you have loaded acpi_video: sudo kldload acpi_video
In my case, the sysctl variables that control brightness level when plugged or unplugged are called hw.acpi.video.lcd0.economy and hw.acpi.video.lcd0.fullpower
So you can try something like this:
sudo sysctl hw.acpi.video.lcd0.economy=100
and see if that works. If so, add the line:
Code: 
hw.acpi.video.lcd0.economy=100
to your /etc/sysctl.conf to make it permanent.
Click to expand...
got this
Code: 
[userx@FreeBSD ~]$ sudo kldload acpi_video
[userx@FreeBSD ~]$ sudo sysctl hw.acpi.video.lcd0.economy=100
hw.acpi.video.lcd0.economy: 50 -> 100

loder.conf
Code: 
security.bsd.allow_destructive_dtrace=0
hw.sdhci.enable_msi=0
fuse_load="YES"
autoboot_delay="5"
snd_hda_load="YES"
acpi_video_load="YES"
sysctl.conf
Code: 
# $FreeBSD: releng/12.1/sbin/sysctl/sysctl.conf 337624 2018-08-11 13:28:03Z brd $
#
#  This file is read when going to multi-user and its contents piped thru
#  ``sysctl'' to adjust kernel values.  ``man 5 sysctl.conf'' for details.
#

# Uncomment this to prevent users from seeing information about processes that
# are being run under another UID.
#security.bsd.see_other_uids=0
kern.randompid=1
kern.vt.enable_bell=0
vfs.usermount=1
hw.acpi.video.lcd0.economy=100

I googled that line and got this
sinetek.io

Adjusting Intel Graphics Brightness in FreeBSD

There are various ways of adjusting the brightness on laptop panels. If you are running the correct Intel driver, it should be a matter of poking around the sysctl’s. ~% sysctl -a | grep lcd …
sinetek.io sinetek.io

which shows this on my system
Code: 
[userx@FreeBSD ~]$ sysctl -a | grep lcd
hw.acpi.video.lcd0.levels: 80 50 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 69 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
hw.acpi.video.lcd0.economy: 100
hw.acpi.video.lcd0.fullpower: 80
hw.acpi.video.lcd0.brightness: 80
hw.acpi.video.lcd0.active: 1

some mod or maintainer of FreeBSD handbook should/needs to add what that web page says on how to deal with backlight and laptops.
 
usebxbw:

Whats the output from : sysctl hw.acpi

I've struggled with several laptops but always made it work in the end.

What kind of laptop are you using? Are you using Intel HD graphics?

Have you tried FN buttons at BIOS load before booting?
 
HP 840 g3
  • CPU. Intel Core i7-6600U
  • GPU. Intel HD Graphics 520 209.
  • Display. 14.0”, Full HD (1920 x 1080), TN.
  • HDD/SSD. 500GB SSD.
  • M.2 Slot. 1x 2280 (M key)
  • 1TB nvme
the only thing I got for FN buttons in BIOS is to switch them from the F keys. Meaning that I will not have to use the Fn button to access them off the F keys. I use my F keys for ttys.

Code: 
[userx@FreeBSD ~]$  sysctl hw.acpi
hw.acpi.thermal.tz7._TSP: -1
hw.acpi.thermal.tz7._TC2: -1
hw.acpi.thermal.tz7._TC1: -1
hw.acpi.thermal.tz7._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz7._CRT: 128.1C
hw.acpi.thermal.tz7._HOT: -1
hw.acpi.thermal.tz7._PSV: -1
hw.acpi.thermal.tz7.thermal_flags: 0
hw.acpi.thermal.tz7.passive_cooling: 0
hw.acpi.thermal.tz7.active: -1
hw.acpi.thermal.tz7.temperature: 0.1C
hw.acpi.thermal.tz6._TSP: -1
hw.acpi.thermal.tz6._TC2: -1
hw.acpi.thermal.tz6._TC1: -1
hw.acpi.thermal.tz6._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz6._CRT: 128.1C
hw.acpi.thermal.tz6._HOT: -1
hw.acpi.thermal.tz6._PSV: -1
hw.acpi.thermal.tz6.thermal_flags: 0
hw.acpi.thermal.tz6.passive_cooling: 0
hw.acpi.thermal.tz6.active: -1
hw.acpi.thermal.tz6.temperature: 0.1C
hw.acpi.thermal.tz5._TSP: -1
hw.acpi.thermal.tz5._TC2: -1
hw.acpi.thermal.tz5._TC1: -1
hw.acpi.thermal.tz5._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz5._CRT: 128.1C
hw.acpi.thermal.tz5._HOT: -1
hw.acpi.thermal.tz5._PSV: -1
hw.acpi.thermal.tz5.thermal_flags: 0
hw.acpi.thermal.tz5.passive_cooling: 0
hw.acpi.thermal.tz5.active: -1
hw.acpi.thermal.tz5.temperature: 0.1C
hw.acpi.thermal.tz4._TSP: -1
hw.acpi.thermal.tz4._TC2: -1
hw.acpi.thermal.tz4._TC1: -1
hw.acpi.thermal.tz4._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz4._CRT: 128.1C
hw.acpi.thermal.tz4._HOT: -1
hw.acpi.thermal.tz4._PSV: -1
hw.acpi.thermal.tz4.thermal_flags: 0
hw.acpi.thermal.tz4.passive_cooling: 0
hw.acpi.thermal.tz4.active: -1
hw.acpi.thermal.tz4.temperature: 25.1C
hw.acpi.thermal.tz3._TSP: -1
hw.acpi.thermal.tz3._TC2: -1
hw.acpi.thermal.tz3._TC1: -1
hw.acpi.thermal.tz3._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz3._CRT: 128.1C
hw.acpi.thermal.tz3._HOT: -1
hw.acpi.thermal.tz3._PSV: -1
hw.acpi.thermal.tz3.thermal_flags: 0
hw.acpi.thermal.tz3.passive_cooling: 0
hw.acpi.thermal.tz3.active: -1
hw.acpi.thermal.tz3.temperature: 25.1C
hw.acpi.thermal.tz2._TSP: -1
hw.acpi.thermal.tz2._TC2: -1
hw.acpi.thermal.tz2._TC1: -1
hw.acpi.thermal.tz2._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz2._CRT: 128.1C
hw.acpi.thermal.tz2._HOT: -1
hw.acpi.thermal.tz2._PSV: -1
hw.acpi.thermal.tz2.thermal_flags: 0
hw.acpi.thermal.tz2.passive_cooling: 0
hw.acpi.thermal.tz2.active: -1
hw.acpi.thermal.tz2.temperature: 31.1C
hw.acpi.thermal.tz1._TSP: -1
hw.acpi.thermal.tz1._TC2: -1
hw.acpi.thermal.tz1._TC1: -1
hw.acpi.thermal.tz1._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz1._CRT: 128.1C
hw.acpi.thermal.tz1._HOT: -1
hw.acpi.thermal.tz1._PSV: -1
hw.acpi.thermal.tz1.thermal_flags: 0
hw.acpi.thermal.tz1.passive_cooling: 0
hw.acpi.thermal.tz1.active: -1
hw.acpi.thermal.tz1.temperature: 0.1C
hw.acpi.thermal.tz0._TSP: -1
hw.acpi.thermal.tz0._TC2: -1
hw.acpi.thermal.tz0._TC1: -1
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz0._CRT: 128.1C
hw.acpi.thermal.tz0._HOT: 100.1C
hw.acpi.thermal.tz0._PSV: -1
hw.acpi.thermal.tz0.thermal_flags: 0
hw.acpi.thermal.tz0.passive_cooling: 0
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.temperature: 40.1C
hw.acpi.thermal.user_override: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.min_runtime: 0
hw.acpi.acline: 1
hw.acpi.battery.info_expire: 5
hw.acpi.battery.units: 1
hw.acpi.battery.state: 0
hw.acpi.battery.rate: 0
hw.acpi.battery.time: -1
hw.acpi.battery.life: 75
hw.acpi.video.lcd0.levels: 80 50 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 69 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
hw.acpi.video.lcd0.economy: 90
hw.acpi.video.lcd0.fullpower: 90
hw.acpi.video.lcd0.brightness: 75
hw.acpi.video.lcd0.active: 1
hw.acpi.cpu.cx_lowest: C1
hw.acpi.reset_video: 0
hw.acpi.handle_reboot: 1
hw.acpi.disable_on_reboot: 0
hw.acpi.verbose: 0
hw.acpi.s4bios: 0
hw.acpi.sleep_delay: 1
hw.acpi.suspend_state: S3
hw.acpi.standby_state: NONE
hw.acpi.lid_switch_state: NONE
hw.acpi.sleep_button_state: S3
hw.acpi.power_button_state: S5
hw.acpi.supported_sleep_state: S3 S4 S5
 
xbacklight no worky, tried it, it is mentioned at the bottom of my first post.

Code: 
[userx@FreeBSD ~]$ intel_backlight
Current backlight value: 100% (937/937)

this OS is silly. It only goes dim whenever it wants to. not every time I plug in or unplug the power cord.
When it does n unplugging it. it will not go back to brightness when I plug it back in. which too is wonky.

but it changes it like xblackling. but I cannot check it because unpluging it does not always make it go dimmer.
Code: 
[userx@FreeBSD ~]$ intel_backlight --help
Current backlight value: 100% (937/937)
Usage: intel_backlight [incr|decr|n] where n is brightness in percent
[userx@FreeBSD ~]$ intel_backlight 50    
Current backlight value: 100% (937/937)
set backlight to 50% (469/937)
[userx@FreeBSD ~]$ intel_backlight 100
Current backlight value: 50% (469/937)
set backlight to 100% (937/937)
[userx@FreeBSD ~]$ intel_backlight 95 
Current backlight value: 100% (937/937)
set backlight to 95% (890/937)
 
Hehe, I would recommend getting a thinkpad of some sort if you plan on using FreeBSD on a laptop.
It makes things a bit easier usually :)
 
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