Bright control on Trisquel

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jules_verne
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Joined: 01/02/2017

Today I installed Trisquel LXDE on a old laptop. There is apparently no bright controller. Nor does the keys assembled with functions (raise and shrink sound, control bright, switch wireless) seems to work. It has to be possible to make em work. How should I start? Never used LXDE before, thought.

Soon.to.be.Free
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Joined: 07/03/2016

It's certainly possible to make them work. Unforunately, in cutting back on the excesses of the major DEs, LXDE has thrown the metaphorical baby out with the metaphorical bathwater- implementing that functionality is left to the user.

In terms of the actual process of doing that, there's instructions at https://adangel.org/2016/01/24/lxde-audio-brightness-keybindings/. I can't vouch for them personally, but they look pretty accurate. There is one change that needs to be made though: in the 'brightness' section, replace all references to gmux_backlight with whatever the subfolder in your /sys/class/backlight folder is. The apple-gmux bit might also need replacing, but it might be worth a try without touching it first.

tonlee
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Joined: 09/08/2014

I bought a new laptop. On debian 8 64bit brightness controls worked. On ubuntu 14.04 64bit they did not. I used these instructions to get brightness controls to work about ubuntu 14.04 64bit.
https://itsfoss.com/fix-brightness-ubuntu-1310/
If they work on trisquel, I do not know.

SuperTramp83

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Joined: 10/31/2014

Well, I haven't used LXDE a lot but I can confirm I did not have the issue which is affecting OP with it. Must be specific hardware related.
A DE that is as lightweight but more 'complete' is Xfce. You can install it very easily on Trisquel.

(And here I go again advertising Xfce, heh)

Mangy Dog

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Xfce******

To complement Soon.to.be.free's article

CHANGE SCREEN BRIGHTNESS IN LXDE
https://linuxcritic.wordpress.com/2015/03/29/change-screen-brightness-in-lxde/

jules_verne
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Joined: 01/02/2017

I changed to XFCE, might give it try,since I see you frequently talking about it so good, right? Unfortunately, bright controllers and audio controller still not giving response.

SuperTramp83

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>I changed to XFCE, might give it try,since I see you frequently talking about it so good, right?

Yeah.. I <3 Xfce, it's purrfect. Even if I had a supercomputer I'd still use it. It's not just its being lightweight.. :)

Magic Banana

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Do function keys work with another desktop environment?

jules_verne
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Joined: 01/02/2017

So far I tried only LXDE and XFCE. None of them worked. This might suggest it isn't a DE problem, right?

Magic Banana

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Right. The function keys may work after a kernel update: https://jxself.org/linux-libre/

jules_verne
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Joined: 01/02/2017

It worked now. Updating kernel + Installing xfce power manager (turns out it won't come installed as default). I'm working on the audio controllers now.

ADFENO
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Joined: 12/31/2012

This might also be helpful:
[[https://listas.trisquel.info/pipermail/trisquel-users/2017-March/076125.html]].

It's a little script I wrote that controls the backlight/brightness
using the Fn keys as recognized by ACPI. Of course, it doesn't do the
magic alone, because the `acpi_listen` command has to understand the
keys being pressed first.

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