Xfce dimming screen on AC disconnect

[ElectricJozin]

Simple issue, like in the title, except I have no idea where it's coming from. Xfce4-power-manager-settings doesn't have any "on disconnect" option.
Also when I plug AC back in, the screen goes to around 80% brightness, after that I need to run:

backlight -f /dev/backlight/intel_backlight0 <ANY NUMBER>

backlight -f /dev/backlight/intel_backlight0 100

Setting the brightness straight up to 100 just doesn't do anything, that's why I first set it to some number and then to 100% (wtf??).
My laptop is the HP folio 1040 G1

 

[Crivens]

A good place to start is the devd man page. You can add these commands to the AC connect and disconnect handlers.

 

[YYY__]

Hmm... Can the hardware go into eco mode when running on battery? (screen, hdd, usb...)

EDIT: See the section: Hidden setting: Minimum brightness value

The tray icon for power manager should show you a screen brightness bar.

 

[jbo@]

Hmm... Can the hardware go into eco mode when running on battery? (screen, hdd, usb...)

Yes. Just setup devd rules to adjust the necessary settings as Crivens mentioned. You can do pretty much anything you want in those rules.

 

[Crivens]

The problem may be that you get a state change event, not a state level event. Meaning, you get the event when the AC is plugged in or out, but you may need some script code in /etc/rc.local to set the start condition.

 

[ElectricJozin]

I probably phrased the question wrong but what I meant is that xfce is dimming the screen automatically on ac disconnect and I am trying to get rid off that.

 

[tingo]

xfce is dimming the screen automatically on ac disconnect

Have you testet that Xfce is the culprit? For example by running it (ac disconnect) when Xfce is not running.

 

[balanga]

I probably phrased the question wrong but what I meant is that xfce is dimming the screen automatically on ac disconnect and I am trying to get rid off that.

Do you see any difference if you are in text mode before running startx? Or if you use twm()as your window manager

 

[YYY__]

pkg install xbacklight
xbacklight -set 100

My old BIOS:

EDIT:

Known issue:

FreeBSD Intel graphics supported?

I'm fairly new to BSD, so when I got to my desktop environment I noticed it was rather sluggish. It came to my attention that instead of using the Intel gpu, xorg had vesa. According to https://wiki.freebsd.org/Graphics#Intel_Graphics, my video card should be supported; intel i3 HD 2xxx HD 3000...

forums.freebsd.org

You could run backlight in your startup shell script or desktop autostart.