Touchscreen not disabled during phone call

[Tim Peeters]

In the middle of a phone call, where I was holding the phone to my ear (so interaction should be blocked), the phone call finished (I could not hear the person at the other end of the line speaking any more), but pushing the hang-up button did not do anything.

I rebooted the phone, and both sim cards were not detected and then I saw that flight mode was on. After switching off flight mode I needed another reboot to get it to work again.

What I think that happened was that during the phone call, I used the top-dropdown-menu with my ear to enable flight mode.

So there are two issues here:
1. Interaction was not blocked while I was in a phone call
2. Dialer app does not detect that flight mode gets enabled and the sim card is disabled (this is already being tracked here https://bugs.launchpad.net/canonical-devices-system-image/+bug/1445580 )

Since then I have been trying to see if the proximity sensor works properly while in a phone call. Once I managed to push the hang-up button while the phone was on my ear (I couldn't see if the screen was on or off). But afterwards I have been testing and the proximity sensor seems fine now, the screen turns off and does not respond to touch when I hold my finger (or ear) close to the camera.

[Tim Peeters (tpeeters)]

In the second part of this bug description: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1445580 it is also said that probably the gsm was switched off while the touchscreen should be disabled: "Another thing is that I somehow switched gsm off while holding my phone to my ear (which may suggest some issue with the top panel) - but I don't know how to reproduce this, hence currently I treat this as an very unfortunate accident."

But since the other bug is about a different issue, I reported this as a separate bug about disabling the touchscreen.