How can a script running in libertine container activate the display?

muskist · 26 Oct 2021, 08:22

I have a Tcl/Tk script started and running in the container. After a while - say 10 min - the script will create a window with a button to press.

Meanwhile the display has gone dark. Therefore I have to press the (hardware) power button in order to activate the display before can press the said (software) button.

Is there any way to activate the display "from within the container" to immediately be able to press the said (software) button and avoid pressing the power button?

Thanks in advance!

Pulsar33 · 26 Oct 2021, 12:02

Not sure to understand what you want and what you mean by "gone dark". Is the screen "dark and locked" or only "dark without any lock pass phrase or code" ?
If there's no pass, why don't you let the screen always on by setting the screensaver to "never" in Preferences ?

I know I don't reply to your question but it's difficult to look for the variable to act on if we don't understand what you want.

Maybe someone knows how to do ? Please tell us ...
Pulsar33

AppLee · 26 Oct 2021, 12:37

Hi @muskist

Have you tried to set keep-display-on:
https://docs.ubports.com/en/latest/appdev/platform/apparmor.html

I don't know if it can be applied to Libertine apps.

muskist · 26 Oct 2021, 13:15

@Pulsar33 and @AppLee Thanks for your replies and sorry for putting my problem so poorly.

I don't want the screen to be always on because I'm trying to make an alarm clock. Therefore the screen has to go inactive ("dark") eventually - else I can't sleep :).

The "snooze" button of the UT clock app is pretty tiny. When I finally found it I'm wide awake.

Therefore I'm trying to make an app with a huge "snooze" button that's filling the whole screen so I just have to tap on the display to hit it. But the screen has to be active to do so.

I want my script to do what the UT-clock-app does: Activate the screen when the alarm goes off.

AppLee · 26 Oct 2021, 18:06

@muskist
If I had to do it, I would fork UT's clock and strip it down.
I think the app should be unconfined in order to be able to wake the screen but you can check the apparmor list I sent.

Pulsar33 · 26 Oct 2021, 18:19

@applee Fine solution !
Pulsar33