If you can find the light sensor in devices, probably/hopefully USB. It could even be exposed in Dbus. You could cludge some daemon together checking it every 10sec or so and adjusting the brightness by sending messages to the screen via Dbus.
It is the same idea as pressing the brightness keys on your keyboard. That is if you can find a way to get value off your light sensor. Other than that, you would need external light sensor to get the light info. This is not much of a help .... Tomas On Fri, May 1, 2020, 07:21 Chuck Hast <wch...@gmail.com> wrote: > That is kind of a pita because this screen is in a location where > during the early morning and evening, lights are turned on and > off. When off we want the screen to drop way down but when > on it needs to come back up so it will be visible again. I know > it works, I have a laptop that has Mate on it and it does it automagicly > I did not even install it. But on this machine I do not even see > see the setup for auto adjust. > I am going to move it to 20.04 anyhow, and the ambient light > auto adjust is quite clearly in 20.04. Maybe with the install the > system did not see the hardware to do this auto ambient and > just did not install it, not sure. But I know that the HP Compaq > 6300 does have the hardware for it as I see windows setup info > for dealing with it. > > > On Fri, May 1, 2020 at 12:21 AM wes <p...@the-wes.com> wrote: > > > obligatory suggestion that is not what you asked for and you have > probably > > already considered: > > > > it would probably be a lot easier to adjust the brightness on a schedule > > rather than based on ambient light. > > > > -wes > > > > On Thu, Apr 30, 2020 at 7:24 PM Chuck Hast <wch...@gmail.com> wrote: > > > > > Folks, > > > I have a HP Compaq 6300 I am using as a DVR terminal to my DVR which is > > > elsewhere on the property. The 6300 just displays the critical camera > > > screens. > > > > > > My issue is that I am trying to figure out how to use the camera on the > > > machine > > > to detect ambient light and adjust screen brightness. I see a lot about > > Win > > > 10 > > > doing so bidden or not. But do not see much about this in Linux. The > > issue > > > is > > > the screen is so bright at night that it bothers my wife. But we do not > > > want to > > > turn it off because if we hear something outside the first thing we do > is > > > look at > > > the screen to see what the cameras are seeing. Since the machine is > > mounted > > > on the wall for viewing there is no keyboard on it and even if there > was > > > wife > > > probably would not try to adjust it. > > > > > > Any ideas on how to use the on board camera to adjust screen > brightness? > > > -- > > > > > > Chuck Hast -- KP4DJT -- > > > I can do all things through Christ which strengtheneth me. > > > Ph 4:13 KJV > > > Todo lo puedo en Cristo que me fortalece. > > > Fil 4:13 RVR1960 > > > _______________________________________________ > > > PLUG mailing list > > > PLUG@pdxlinux.org > > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > > > _______________________________________________ > > PLUG mailing list > > PLUG@pdxlinux.org > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > > > -- > > Chuck Hast -- KP4DJT -- > I can do all things through Christ which strengtheneth me. > Ph 4:13 KJV > Todo lo puedo en Cristo que me fortalece. > Fil 4:13 RVR1960 > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
