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Update OS ( linux lubuntu ) and drag and drop locks up whole OS

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  • T Offline
    T Offline
    tony67
    wrote on last edited by tony67
    #1

    HI All,
    I have some software in written on creator. In the past it ran great. However I've just update from lubuntu 14.04 to lubuntu 16.04 ( linux ) and now drag and drop operations lock the whole OS. I can drag and drop the first time I open any drag and drop dialogue. But when I re open or open a new drag and drop field and I start to drag and drop after item is drag a couple of pixels my whole OS locks up and the only way to recover is a reboot. I've tried to recompile against this OS ( 16.04 ) but the issue is still there.
    Has anyone seen this before, update OS software cause whole OS to lock up? And can anyone offer any advise please. Thanks in advance :D

    PS eveything else appears to work fine, creator is 3.5.1.

    Should add I've just tested in creator in debug mode, works fine. Use a stand alone build and lock up

    JonBJ 1 Reply Last reply
    0
    • T tony67

      HI All,
      I have some software in written on creator. In the past it ran great. However I've just update from lubuntu 14.04 to lubuntu 16.04 ( linux ) and now drag and drop operations lock the whole OS. I can drag and drop the first time I open any drag and drop dialogue. But when I re open or open a new drag and drop field and I start to drag and drop after item is drag a couple of pixels my whole OS locks up and the only way to recover is a reboot. I've tried to recompile against this OS ( 16.04 ) but the issue is still there.
      Has anyone seen this before, update OS software cause whole OS to lock up? And can anyone offer any advise please. Thanks in advance :D

      PS eveything else appears to work fine, creator is 3.5.1.

      Should add I've just tested in creator in debug mode, works fine. Use a stand alone build and lock up

      JonBJ Online
      JonBJ Online
      JonB
      wrote on last edited by
      #2

      @tony67
      Never mind that you wrote the code/compiled in Qt Creator: are you saying that the app with d&d only "locks" when you run it from Qt Creator, or does it do same when you run it as standalone executable outside of Qt Creator?

      Similarly, (when run outside Qt Creator) are you saying the "lock" depends on whether you compiled the executable for debug versus release?

      Need to determine whether Qt Creator itself has any relevance, or just the executable you generated.

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      • T Offline
        T Offline
        tony67
        wrote on last edited by
        #3

        Thanks.
        When I run in Qtcreator in debug mode it runs fine. No lock up. If I run as a standalone it locks the whole OS. I'll try running from Qt in none debug later today. I realise it's a long shot posting but thought someone might come back with a "ahh 16.04 lubuntu has an issue..." or something along those lines.

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        • mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Hi
          By standalone, you mean clicking on the ".exe" ?
          It sounds like it picks up some wrong Qt so files.
          do a LDD on exe and look where it loads stuff from.
          If not from the folder of the Qt you used to create the ".exe" its the reason.

          You are supposed to make a deployment folder and run it there. with the right SO files.

          1 Reply Last reply
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          • T Offline
            T Offline
            tony67
            wrote on last edited by
            #5

            Thanks that looks like the issue. I'm just using the exe. I'll look into the libs.

            mrjjM 1 Reply Last reply
            0
            • T tony67

              Thanks that looks like the issue. I'm just using the exe. I'll look into the libs.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #6

              @tony67
              btw I like this place for the deployment folder info
              http://www.tripleboot.org/?p=138
              section "Linux GCC 32-bit and 64-bit compilers:"

              1 Reply Last reply
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