Welcome to Devuan!

I use the brightnessctl package. Works well for my needs.

apt install brightnessctl

man brightnessctl

Good luck on whichever path you take.

EDIT: A couple of examples...

user@devuan:~$ brightnessctl info
Device 'radeon_bl0' of class 'backlight':
        Current brightness: 255 (100%)
        Max brightness: 255

user@devuan:~$ brightnessctl set 100
Updated device 'radeon_bl0':
Device 'radeon_bl0' of class 'backlight':
        Current brightness: 100 (39%)
        Max brightness: 255

EDIT #2: Instead of whole numbers, you can also use percentages if desired; such as...

user@devuan:~$ brightnessctl set 80%
Updated device 'radeon_bl0':
Device 'radeon_bl0' of class 'backlight':
        Current brightness: 204 (80%)
        Max brightness: 255

One thing that I learned many years ago when running unstable...

Look at the terminal output before agreeing to an upgrade. If it's going to remove something that you consider detrimental to your system, tell it n (no). You can then upgrade the other packages individually that aren't part of the packages that will/would be removed.

Under normal circumstances, it will be fixed within a few days. Other times, it may take a week or two. I remember one time...not that my memory is that good any longer...but I remember one time...I probably went nearly two or three months before the package was fixed and able to be upgraded.

During that time, I upgraded all of the other stuff individually.

However, I was still frisky back then. I've gotten older and cantankerous and just want a stable system now.

Uncle aluma,

I don't mean to overstep my bounds if what I say is for nought, but have you tried apulse to get sound working in Firefox?

YOU"RE THE MAN aluma!!!

I like Sakura, but you can copy and paste in xterm on Devuan. No need to bring in another terminal.

Do some automagic with an .Xresources file to make xterm look decent...

! Run --> xrdb -load .Xresources <-- after editing this file

Xft.autohint: 1
Xft.antialias: 1
Xft.hinting: true
Xft.hintstyle: hintslight
Xft.dpi: 96
Xft.rgba: rgb
Xft.lcdfilter: lcddefault

xterm*faceName:   Liberation Mono
xterm*faceSize:   11
xterm*charClass:  33:48,37-38:48,45-47:48,64:48,58:48,126:48,61:48,63:48,43:48,35:48
xterm*saveLines:  16384
xterm*geometry:   78x24
XTerm*utf8:       1
!xterm*ScrollBar:   true
!xterm*rightScrollBar: true
XTerm*ScrollKey:  true
xterm*termName:   xterm-color

XTerm.vt100.translations: #override \n\
Ctrl <Key> minus: smaller-vt-font() \n\
Ctrl <Key> plus: larger-vt-font() \n\
Ctrl <Key> 0: set-vt-font(d) \n\

*background:      #2D2D2D
*foreground:      #C3C9D9
*.color0:         #2b2b2b
*.color8:         #5a647e
*.color1:         #da4939
*.color9:         #da4939
*.color2:         #a5c261
*.color10:        #a5c261
*.color3:         #ffc66d
*.color11:        #ffc66d
*.color4:         #6d9cbe
*.color12:        #6d9cbe
*.color5:         #b6b3eb
*.color13:        #b6b3eb
*.color6:         #519f50
*.color14:        #519f50
*.color7:         #e6e1dc
*.color15:        #f9f7f3

...Even give it transparency in a picom.conf file...if that floats your boat!

opacity-rule = ["85:class_g*='XTerm'"];

...change 85 to whatever amount of transparency you'd prefer.

On my system, I can copy/paste in xterm...

1. Highlight the text that you want to copy and paste...DO NOT RIGHT CLICK on the highlighted text to select "Copy"...just highlight the text with your mouse.
2. After highlighting the text, go to xterm and middle-click on your mouse. BAM!!! It's there.

No charge. You're welcome.

Edited to add: Add the following to your autostart if you want xterm to look slickly/cooly/shmoozly every time...from your shiny startup until your flashy shutdown...

xrdb -load .Xresources

JWM-Kit,

Thanks; good!

By the way, you produce good things! Take care man!

Braaaa,

I'm not sure how my post was taken, but I didn't mean for it to come across as a put-down upon others if that's how it was taken.

We all have our preferences. Full stop.

What I may accept or deny is my preference. What others may accept or deny is theirs. I never said anything against how others express their preferences???

I have no use for tiling window managers; other people love them.

Am I right, or are they wrong?

It's up to the individual.

Yes, it's fun to see how others configure their system...and glean from their expertise...but at the end of the day, we all make out our systems as we prefer.

Take care.

Q.  Why did the non-binary gold prospector head out west?

A.  Because there was gold in them/their hills.

I asked my North Korean friend what it's like to live there.

He said, "Well, I can't complain."

I met a lady last night and asked her when her birthday was.

She said, "March 1st."

So, I walked around the room and asked her again.