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problem with laptop brightness
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klas
n00b
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Joined: 30 Aug 2017
Posts: 49
Location: Bradford, UK

PostPosted: Sun Oct 08, 2017 11:26 pm    Post subject: problem with laptop brightness Reply with quote

Hi guys ,
Anyone to help me fix my laptop brightness . It always goes back to full brightness everytime I restart the machine.
I have a lenovo thinkpad x1 carbon second gen.
Command
Code:
zgrep BACKLIGHT /proc/config.gz
throws something like this
Code:

adam@grodo ~ $ zgrep BACKLIGHT /proc/config.gz
# CONFIG_FB_BACKLIGHT is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_BACKLIGHT_CLASS_DEVICE=m
CONFIG_BACKLIGHT_GENERIC=m
# CONFIG_BACKLIGHT_APPLE is not set
# CONFIG_BACKLIGHT_PM8941_WLED is not set
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set
# CONFIG_BACKLIGHT_LM3639 is not set
# CONFIG_BACKLIGHT_LV5207LP is not set
# CONFIG_BACKLIGHT_BD6107 is not set
# CONFIG_BACKLIGHT_ARCXCNN is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set

Kind Regards,
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Hieronymus Bosch
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Joined: 29 Jan 2015
Posts: 55
Location: Ciudad Juarez, Mexico

PostPosted: Mon Oct 09, 2017 12:21 am    Post subject: Reply with quote

Chage the following to built-in kernel :

Code:

CONFIG_BACKLIGHT_CLASS_DEVICE=m
CONFIG_BACKLIGHT_GENERIC=m


Also, you can install x11-apps/xbacklight and then make a init script to adjust brightness.
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_Nomad_
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Joined: 11 Apr 2003
Posts: 571

PostPosted: Wed Oct 11, 2017 6:37 am    Post subject: Reply with quote

or you can simply echo the desired value into
Code:
/sys/class/backlight/{provider}/brightness
.
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