On Fri, Jan 12, 2018 at 8:12 PM, Gregory Nowak <g...@gregn.net> wrote:
> On Fri, Jan 12, 2018 at 10:20:06AM +0100, Didier Kryn wrote: > > The brightness is controlled through 3 files in > > /sys/class/backlight/intel_backlight, named actual_brightness, > brightness > > and max_brightness. > > > > The brightness can be controlled by writing to these files. But these > > files do not exist if xfce4-power-manager isn't installed. So it seems I > > need this package (or an equivalent in another DE) to be able to set a > > decent brightness. > > Hmmm, are you sure? I have a text only install of devuan Jessie on an > external usb drive (no GUI at all), and these files do exist for me on > that install when I use it on my laptop. > Modern Linux distributions include a /sys directory as a virtual filesystem (*sysfs*, comparable to /proc, which is a *procfs*), which stores and allows modification of the devices connected to the system, whereas many traditional UNIX and Unix-like operating systems use /sys as a symbolic link to the kernel source tree. From: https://superuser.com/questions/794198/directory-sys-in-linux You may want to start here if your interested in digging deeper.
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