On Thursday 11 July 2019 23:35:54 Mike Bird wrote:
> On Thu July 11 2019 14:28:29 andre_debian@... wrote:
> > On my laptop computer , the keys F11 and F12,
> > adjusts the brightness of the screen.
> > But on Debian-Stretch with trinity, these two keys do nothing.

> I can't help you with F11 and F12 but if it's a 70% brightness
> you want you can put "xbacklight -set 70" in a file called
> ".xsessionrc" in your home directory.

Hello,

$ xbacklight -set 70
"No outputs have backlight property"

(xbacklight is installed) I'am on Debian Stretch.

The others solutions proposed don't work.

Regards,

Andr�