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Problem with frame buffer blank in linux



  • Hello,

    I developed an application in qt quick for imx6 and run it on linux 4.1.36 and it works fine the only problem I have is that when I try to blank the screen to save the energy by below command :

    echo 1 > /sys/classes/graphics/fb0/blank

    And unblank it again the behaviour is undefined, sometimes it works fine sometimes the screen start flickering and sometime it hangs and I have to restart the system!

    Another weird thing is that my system has auto blank feature so it blanks the screen when there is no user activity but when i run qt quick application even its own qt quick example application the screen never blank!

    Linux 4.1.36
    Qt sdk 5.9 and 5.11

    Thanks in advance for your time and help

    Best,
    Alien


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