Screen brightness

[Bob]

Is there any way to turn down screen brightness, either via terminal or system settings? The closest thing I can find is System Tools -- Power Manager --Display. That gives options regarding adjusting brightness after inactivity, but I am wondering if it's possible to set the default brightness?

Thanks.

[Bob]

anyone?

[Unman]

On Mon, Jun 19, 2017 at 06:20:14PM -0700, Bob wrote:
> Is there any way to turn down screen brightness, either via terminal or system settings? The closest thing I can find is System Tools -- Power Manager --Display. That gives options regarding adjusting brightness after inactivity, but I am wondering if it's possible to set the default brightness?
>
> Thanks.
>

A quick search ("fedora change brightness") throws up a number of
solutions if you cant do this with monitor or Function keys -
suggestions include installing xbacklight and booting with various
acpi_backlight options. I would try those first.
I don't think there's anything Qubes specific here - you need to find a
solution that works with Fedora and (if you need to install software)
install it in dom0, since that provides the graphics.
To install software in dom0 you use the 'qubes-dom0-update' command,
which needs to be run as root. This will download the software in the
updateVM and then transfer it in to dom0 - this is necessary because
dom0 has no networking.

[Reg Tiangha]

If you're using XFCE and you have the Power Management tray icon in your
Notification Tray, you can also right-click on it and it'll bring up a
screen brightness slider that you can adjust, if your machine supports
it (for example, it doesn't appear on my desktop but it does on my
notebook).