Ubuntu
linux package

  1. Bug #1098216
  2. Comment #230

Comment 230 for bug 1098216

Revision history for this message
In , aaron.lu (aaron.lu-linux-kernel-bugs) wrote :

(In reply to comment #103)
> (In reply to comment #102)
> > (In reply to comment #101)
> > > grep . /sys/class/backlight/acpi_video0/*
> > > /sys/class/backlight/acpi_video0/actual_brightness:100
> > > /sys/class/backlight/acpi_video0/bl_power:0
> > > /sys/class/backlight/acpi_video0/brightness:100
> > > egrep: /sys/class/backlight/acpi_video0/device: Is a directory
> > > /sys/class/backlight/acpi_video0/max_brightness:100
> > > egrep: /sys/class/backlight/acpi_video0/power: Is a directory
> > > egrep: /sys/class/backlight/acpi_video0/subsystem: Is a directory
> > > /sys/class/backlight/acpi_video0/type:firmware
> > yep. you have this bug.
> > >max_brightness:100
> > not all values work. I'm right ?
>
> Yes. Working values are:
>
> - every 5 from 5 to 70
> - every 10 from 70 to 100

Then this is a problem for people relying on GUI to do the automatic brightness adjustment, it can prevent brightness getting downwards.