Xfce Forum

jarp53

Member

Registered: 2019-11-09

Posts: 20

brightness slider

I read that in laptops power manager can be use to reduce screen brightness , is there a way that we can do the same in desktop computer

ToZ

Administrator

From: Canada

Registered: 2011-06-02

Posts: 11,485

Re: brightness slider

Does your computer have a backlight interface:

ls /sys/class/backlight/

Can you also post back the output of:

xfce4-power-manager --dump

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jarp53

Member

Registered: 2019-11-09

Posts: 20

Re: brightness slider

[jr@jr-z68x ~]$ ls /sys/class/backlight/
[jr@jr-z68x ~]$ xfce4-power-manager --dump
---------------------------------------------------
       Xfce power manager version 4.16.0
With policykit support
Without network manager support
---------------------------------------------------
Can suspend: True
Can hibernate: True
Authorized to suspend: True
Authorized to hibernate: True
Authorized to shutdown: True
Has battery: False
Has brightness panel: False
Has power button: True
Has hibernate button: True
Has sleep button: True

ToZ

Administrator

From: Canada

Registered: 2011-06-02

Posts: 11,485

Re: brightness slider

Has brightness panel: False

So, short answer, no - its not supported by xfce4-power-manager.

Are you able to dim the screen using xrandr? Something like:

xrandr --output OUTPUT --brightness 0.5

...where OUTPUT is the name of your xrandr output that you can see by just running "xrandr".

There is also https://gitlab.xfce.org/xfce/xfce4-powe … issues/158.

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jarp53

Member

Registered: 2019-11-09

Posts: 20

Re: brightness slider

I had to install redshift , but it would be nice if we could have a panel plugin ; MX has one which is a lot better than redshift because it can calibrated on the spot which makes it real convenient. thanks for your attention , XFCE4 still number one for me !!!

Last edited by jarp53 (2022-04-22 17:32:42)

KBar

Member

Registered: 2021-11-05

Posts: 689

Re: brightness slider

I believe you can achieve that with redshift as well, though only through its command line and rc-file. I never bothered with it since redshift-gtk (the one in the panel) usually is enough for me.

They should be installed together, I think.

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