On Monday 15 July 2019 15:09:21 Dr. Nikolaus Klepp wrote:
> Anno domini 2019 Mon, 15 Jul 14:59:21 +0200
>  andre_debian@... scripsit:
> > 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.

> > $ xbacklight -set 70
> > "No outputs have backlight property"
> > (xbacklight is installed) I'am on Debian Stretch.
> > The others solutions proposed don't work.

> What hardware are you on? Thinkpads need thinkpad_acpi for this to work ...

My computer laptop is Lenovo, video card Intel 520.

Only the Function keys F1 and F2 work for the sound, increase , decrease.

Package "thinkpad_acpi" doesn't exist on Debian.