airplane mode is switching on off continuously (18.04)

I have updated ubuntu from 16.04 to 18.04.
The system has worked properly for one day.

After that it started to switching between airplane ✈️ mode on and off continuously.

enter image description here

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Why is the A380 a double-decker rather than a longer airplane?

It seems like making the A380 a double-decker increases the cross-sectional area of the fuselage, thereby increasing drag on the airplane. Wouldn’t it be more efficient to fit so many seats in a longer airplane rather than a wider airplane?

So, is the A380 a double-decker because there is a limit to how long an airplane can be, would it be impractical to make a longer airplane, am I wrong about the cross-sectional area/length trade off when it comes to drag, or is there some other reason?

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Strange optical distortion in a video recorded from an airplane window

I recorded this video from an airplane window while it was decreasing its elevation. What is the explanation for this optical distortion? This distortion appeared only in a certain range of elevation. Does it have anything to do with the temperature differences in different elevations?

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Can i ask a seat belt extender on wizzair airplane?

so far I was afraid to ask for a seat belt extender and I did not attach a seat belt, but I’m afraid that once it turns out I’m traveling with an open belt and this is a constant stress. can i ask a seat belt extender on the airplane? I just have to talk to the cabin crew?

sorry, I’m learning English 🙂

Thank you for your help and kindness.

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Airplane mode automatic turn on problem

Why does the airplane mode turn on automatically when both my wifi and bluetooth are turned off? How do I disable it?

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Categories of aircraft (A,B,C,D): Is it possible for an airplane to move into a different category?

Categories are defined for the Vat (Speed at threshold) which is Vso multiplied by 1.3, or Vsldg multiplied by 1.23 .
Since these speeds are related to the weight of the aircraft is it possible for an aircraft to start the flight in one category but then move into another one?

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Why airplane wheels emit smoke on landing?

I’ve seen this phenomenon a lot of times but I can’t give it a physically explanation. Someone has an idea?

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Why do sea waves seem to be standing still when you look from the window of an airplane?

Looking from the window of a passenger plane even at moderate altitude such that one can still recognize individual waves and even something like white foam, and small boats close to the cost line, it already looks like the water is not moving.

To make more clear what i mean, here is an example
in youtube.com/watch?v=GUDV7oVm76k at around 10:40
In hd eye resolution it is much more intreging, but the video shows the idea, that even when the plane is quite low, waves close at the beach appear to be “frozen”.

Why is that? and does that effect have a name?

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What kind of airplane is this that has blue cheatlines and a protruding side cover?

enter image description here

Does anyone here know wich airplane this is? I suspect it is russian but its too poor quality for me to tell, im pretty sure it is millitary.

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Question: Airplane seats?

Question: Airplane seats?

Question: Airplane seats?

with the ever increasing tightness of airplane seats, are you a person who still thinks it is okay to take up 2 more inches of space that the person behind you purchased to add to your own comfort? If you are one of these rude people, how do you feel if you want to spend some time in flight sitting upright working on your computer or reading and the person in front of you suddenly slams their seat back shoving your tray table 2 inches closer to you?

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