Lenovo y550 + magnet

    Good afternoon, gentlemen habrozhitel!
    To begin with, like many of you using the OS of the windows family, I like to reinstall my system from time to time, enjoying a week of quick work of a clean OS. So this time I decided to occupy myself at the New Year holidays (although rather from reluctance to finish my diploma :)) and to tear things to hell. Since my laptop is quite new, six months old, the installation of all the settings in my head did not delay, and I was lazy to make images of the system, set up the system in a new way, did something as it was, something in a new way. Worst of all, it turned out with the sound settings (the standard utility did not work at first) and the display turned off - for some reason, it periodically turned off the backlight and did not respond to mouse movements or pressing the keyboard.
    Then there will be a more interesting story about a feature or a laptop bug.
    The funniest part starts here - on New Year's Day I was given a PocketBook 301 Plus reader, which had already been fond of falling in love with me as standard (which is important, please note :)). Of course, partly because I like to read, partly that this is a new gadget, but more because of the reluctance to take up a diploma, I sit and read book after book right in front of my laptop.
    And just yesterday I began to notice (like the Vigilant Eye from a joke) that the screen goes blank for a reason, and not even after a certain time, but when I put the book in the cover on an open laptop on top of the touchpad. At first, I thought it was a tricky undocumented feature - a built-in light detector - cool, but on my hand closures everything that the screen could go on did not go out ...
    And just a few minutes ago, I accidentally laid the reader’s corner on top of the microphone next to the touchpad (circled)
    image

    Here, I think, it will be appropriate to notice that the cover as standard is equipped with pretty strong magnets (very convenient for reading, by the way). And it turns out that if you bring the magnet exactly to this point (it doesn’t work with others), the screen goes dead and does not respond to any actions, even keyboard shortcuts.

    Hence the question - is it a bug or feature like those rubber puffs that were on old laptops and turned off the screen when the covers were closed?

    UPD : now I held the lid with a magnet in the same place - it pushes off, so it's still a feature!
    UPD2 : yes, I was already told that this is a Hall sensor, you can read on Wikipedia

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