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Yocto Qt application touch generate memory leak

Question asked by ark ceajin on Jun 19, 2015
Latest reply on Jun 26, 2015 by ark ceajin

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Guys, i need help, i successfully compiled the Yocto, when i try to run a empty Qt application, only contain a QWindow, and keep touching screen about five minutes.
then as touching, memory usage keep increasing, finally monitor to black, looks like Linux terminal console.

So i guess the Yocto GUI and my little Demo is crash, but the Linux core still running.

OS: Poky ( Yocto Project Reference Distro ) 1.6.2

Board: i MAX6Q

Could anyone tell me what wrong with my Yocto, is this a BUG?

Thanks forward

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8 Replies

igorpadykov Jun 22, 2015 5:06 PM
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Hi ark

please look at simple Qt hellow world tutorial
http://cache.freescale.com/files/training/doc/dwf/QT_IMX6.pdf
then one can follow sect.5.6.7 Qt5 attached document
from L3.14.28_1.0.0_iMX6QDLS_BUNDLE

Best regards
igor
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- ark ceajin @ igorpadykov on Jun 23, 2015 2:13 AM
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  Hello Igor
  
  I reviewed the document and attachment. Sorry still not get the point.
  
  The error message log show as below:
  [1943670.533] (II) XINPUT: Adding extended input device "Advanced Silicon S.A. CoolTouch(TM) System" (type: TOUCHSCREEN, id 9) [1943670.533] (II) evdev: Advanced Silicon S.A. CoolTouch(TM) System: initialized for absolute axes. [1943670.534] (**) Advanced Silicon S.A. CoolTouch(TM) System: (accel) keeping acceleration scheme 1 [1943670.534] (**) Advanced Silicon S.A. CoolTouch(TM) System: (accel) acceleration profile 0 [1943670.534] (**) Advanced Silicon S.A. CoolTouch(TM) System: (accel) acceleration factor: 2.000 [1943670.534] (**) Advanced Silicon S.A. CoolTouch(TM) System: (accel) acceleration threshold: 4 (EE) (EE) Backtrace: (EE) (EE) Segmentation fault at address 0x68 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file.
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  - igorpadykov @ ark ceajin on Jun 23, 2015 4:55 AM
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    Hi ark
    
    will memory leak disappear if you remove touch driver ?
    
    ~igor
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    - ark ceajin @ igorpadykov on Jun 23, 2015 6:45 PM
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      Hi igor
      
      Memory leak wont occur if i use mouse.
      memory usage keep increasing as i touching screen continuously, if i stop touching ,the memory increasing also stop.
      
      Ark
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      - igorpadykov @ ark ceajin on Jun 23, 2015 11:07 PM
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        Hi ark
        
        you can try to debug with memory leak detection tools
        
        QT mem leak
        
        http://www.qtcentre.org/threads/56705-Qt-amp-Memory-Leak
        
        Memory Debuggers - eLinux.org
        
        ~igor
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        ark ceajin @ igorpadykov on Jun 25, 2015 3:01 AM
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        Hello igor
        
        Sorry i didn't explain briefly.
        Every program crash, no matter the one i created or Yocto one.
        If i run program which i created, Yocto GUI and the program both crash except Linux core.
        If i run Yocto original program, Whole Yocto crashed.
        
        igor
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        igorpadykov @ ark ceajin on Jun 25, 2015 4:37 AM
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        Hi ark
        
        please read link below
        
        Yocto Training - HOME
        How to Test Yocto for i.MX6
        
        also you can apply to training
        
        Open Source Yocto y Freescale|Freescale
        
        if this is custom board it may be recommended to run ddr test
        
        https://community.freescale.com/docs/DOC-96412
        
        ~igor
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        ark ceajin @ igorpadykov on Jun 26, 2015 12:58 AM
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        Hi igor
        
        We found out the bug which cause memory leak.
        The problem happen in XInput2 lib.
        So we change to XInput1 lib, the problem solved.
        
        ark
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Yocto Qt application touch generate memory leak

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