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  1. Minecraft: Java Edition
  2. MC-114553

Alt-tab while in fullscreen = crash



    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 17w43b
    • Minecraft 1.11.2, Minecraft 17w06a, Minecraft 17w13b, Minecraft 17w14a, Minecraft 1.12.1
    • Windows 10, Java 8, new and old Minecraft launcher, NVIDIA GeForce GTX 750 Ti (Graphic card), AMD FX-6300 (CPU)
    • Unconfirmed


      The bug:
      (while in fullscreen and in a world*) Switching to another window with ALT+TAB and switching back to Minecraft freezes the game for several seconds and sometimes crashes it**.

      How to reproduce:
      -Open Minecraft and join a world*
      -Press F11 to fullscreen Minecraft
      -Do NOT open GUIs or pause the game
      -Press Alt-Tab and switch to another window
      -Wait some minutes (up to 10)
      -Press Alt-Tab and switch to Minecraft
      -Sometimes it freezes and sometimes it crashes**

      *It happens while in the menu too, but rarely
      **Most of the times all works propely. Then reload the world\try another world\wait more time

      What I think happens:
      By analyzing the crash log "latest.txt" from 17w13b I found:
      [15:42:59] [Server thread/INFO]: Stypox lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
      [15:42:59] [Server thread/INFO]: Stypox ha abbandonato la partita (Stypox left the game)
      [15:42:59] [Server thread/INFO]: Stopping singleplayer server as player logged out
      But I only tabbed out and I didn't left the internal server. I think it does that every time you tab out of the game while in fullscreen. If someone can read Minecraft code... please check this little thing.
      When I tabbed back in Minecraft (35 minutes later) it reloaded the server and logged me back in. Then it crashed. (I'm not going to post all the threads )

      -"latest.txt" is the log file (italian language). No crash-reports were created.
      -Image "2017-02-27_19.34.31.jpg" and "Immagine.jpg" are the same screenshot (taken with stamp), but "Immagine.jpg" is rendered with Paint and "2017-02-27_19.34.31.jpg" with Cyberlink Photodirector 8. They shows Minecraft freezed. I don't know why but they are a little bit different using different programs...
      -"Immagine2.jpg" shows Minecraft after clicking on the screen. The black colour is in reality trasparent. Then all will become white and Windows will show the crash message.


        1. 2017-02-27_19.34.31.jpg
          181 kB
        2. Immagine.jpg
          66 kB
        3. Immagine2.jpg
          35 kB
        4. latest.log
          6 kB



            Unassigned Unassigned
            Stypox Stypox
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