Score:1

Ubuntu

how to reduce blue light in xubuntu 22.04

hugogogo

2/25/24, 8:18 AM

I want to reduce the blue light of my screen, I thought it would be easy, but I have trouble doing this :

blue light

most internet answers are for ubuntu (not xubuntu) and propose this solution : settings > display > blue light, but I don't find it under my release of xubuntu 22.04.1 LTS (Jammy Jellyfish)

flux

then i tried to use flux, but i couldn't install it, https://github.com/xflux-gui/fluxgui, ppa didn't work and the workaround was not clear, maybe i misunderstood something, but it's using redshift anyway

redshift

so I tried to use redshift, https://github.com/jonls/redshift, but unfortunately i couldn't :

first i got geoclue error https://github.com/jonls/redshift/issues/318
then I tried a manual configuration with a config file, but I couldn't get it work, redshift gives me an fopen: permission denied : following instruction of the readme, I installed the config file in ~/.config/redshift/redshift.conf, I had to create ~/.config/redshift/ first, and I changed the permissions to try to solve the issue :
- ~/.config/ was rwxr-xr-x
- ~/.config/redshift/ was rwxrwxr-x
- ~/.config/redshift/redshift.conf was rw-rw-r--
- i made all of them rwxrwxr-x, but without luck
and finally i could launch it with this command but then I cannot control the time : redshift -l LAT:LONG so it's not what I want

do you have a solution to reduce the blue light in xubuntu 22.04 ?

279

1 + 7

xubuntu

guiverc

2/25/24, 8:48 AM

Why don't you just use `redshift`? I've been using it since ~14.04 & prefer it even if I'm not using Xubuntu/Xfce; as it works in all desktops without change (GNOME's Night Light for example is for GNOME only). I don't understand your redshift issue; and you didn't provide specific details as to how you tried to use it (ie. I've used default version since 16.04) or provide your `redshift.conf` for example...

hugogogo

2/25/24, 2:20 PM

the conf file is just the default one found here https://github.com/jonls/redshift/blob/master/redshift.conf.sample, the pbm is not the content : it doesn't open, with the error `fopen: permission denied`. The command`redshift` alone gives me the geoclue error as mentionned with the link, and none of the solution proposed in the issue page worked for me. I can run it with this command : `redshift -l LAT:LONG` but i want to have control on the times it changes the light, not something based on geographical position

guiverc

2/25/24, 10:55 PM

You mention where you get your source, github sources are usually for the latest version of the software (*closest to the lunar I'm using, but you're on a stable LTS release so may have older software, did you verify it's valid for your version?*) but did you place it in the correct location on your system? and most importantly with correct file permissions? as permission denied implies you did not & your major issue is HOW you placed it on you local file-system... but you gave no specifics. It reads as an operator error in your getting & placing the conf file on your system

hugogogo

2/26/24, 11:39 PM

I puted the conf file in `~/.config/redshift/redshift.conf` as stated in the faq of the readme file on github, because the `$XDG_CONFIG_HOME` env variable is empty on my system. I launched `redshift -c .config/redshift/redshift.conf`, I had to create `~/.config/redshift/` first, the permissions for `.config/` where `rwxr-xr-x`, for `.config/redshift/` it was `rwxrwxr-x`, and for `.config/redshift/redshift.conf` it was `rw-rw-r--`. I changed all of them for 777 (`rwxrwxrwx`) but i still get the same error.

hugogogo

2/26/24, 11:43 PM

ho yes, you where right about the version : I didn't notice there where three versions of the readme, on the second one they gives a different location, and it worked ! `.config/redshift.conf`

guiverc

2/26/24, 11:44 PM

This site isn't a forum, but a Q&A site. Please add additional details to your question (where it's easier to read & greater formatting options exist). I don't have time to read that comment, which was made to the OP (or yourself) anyway given it was written as a comment.

guiverc

2/26/24, 11:47 PM

FYI: If you've solved it, you can write your own answer (*and gain rep*). You can credit me via reference to comments if you like, but well done for solving it if you did! *Please add additional details in future to your question, but you can add them to an answer if appropriate there instead & you write one*

Score:2

Ubuntu

hugogogo

2/26/24, 11:57 PM

after discussion with @guiverc in the comments, I found the solution :

the readme page had versions, and the last one was not the right one for me, I had to place the config file in ~/.config/redshift.conf

+ 2

guiverc

2/27/24, 12:05 AM

Thanks for sharing your answer so it'll help others :)

hugogogo

2/27/24, 12:41 AM

thanks to you !

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