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Re: How to set default screen brightness?
From: |
Tobias Geerinckx-Rice |
Subject: |
Re: How to set default screen brightness? |
Date: |
Sat, 15 Jun 2019 19:41:13 +0200 |
Jesse,
Jesse Gibbons wrote:
My Librem 13 laptop battery lasts much longer with a lower
screen
brightness. When it runs gnome on guix (and I haven't tried any
other
de) I have to turn down the brightness every time. This is not
so with
my other partition running PureOS. Is there a way to configure a
default screen brightness in guix/gnome?
Guix doesn't have a notion of ‘default’ screen brightness because
it doesn't know anything about brightness.
My guess is that PureOS uses systemd; systemd provides a
backlight.service that reads the backlight brightness at shutdown,
stores it to disc, and writes that value back to the device at
next start-up.
It would be a relatively trivial service to add, but that hasn't
been done yet :-)
We do already provide a simple, script-friendly abstraction tool¹:
$ guix install light
$ sudo light -S 50 # percentage
It can even run setuid.
Kind regards,
T G-R
[1]: As opposed to manually reading and writing `find /sys -path
*backlight*brightness*`.
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