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.

--Mike