The screen shuts off after 10-15 minutes

Discussion in 'Kernels' started by Teleco88, Dec 16, 2016.

  1. Teleco88

    Teleco88 New Member

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    Hi, friends!
    I am making a custom filesystem to use on my Udoo with only the files I need. My idea is to use the Udoo and display images using the screen (LVDS 7 ") and using a C application that shows images in the framebuffer.
    My problem is the next one after being 10-15 minutes showing an image, the screen goes out and stops showing.

    Anyone know what this may be?
    Is it in the activated kernel something related to the energy saving that causes the screen to be turned off after 10-15 minutes?

    - Kernel 3.14.56 (Oficial)
    - Custom fs
    - Framebuffer to show images.
     
  2. waltervl

    waltervl UDOOer

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    Does it do the same when attached to an HDMI monitor?
     
  3. patrykk

    patrykk Member

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    for lvds backlight we just use only gpio backlight which switch off certain gpio.
    So in a sys you have a backlight device /sys/devices/soc0/backlight_lcd/ . you could use some power daemon to control it in a backgroup.
     
  4. patrykk

    patrykk Member

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    btw. you could remove backlight from dts file and inform what happened.
     
  5. Teleco88

    Teleco88 New Member

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    Hi, All!
    | Does it do the same when attached to an HDMI monitor?
    Yes, the same problem.​
    |for lvds backlight we just use only gpio backlight which switch off certain gpio.
    |So in a sys you have a backlight device /sys/devices/soc0/backlight_lcd/ . you could use some power daemon to |control it in a backgroup.
    I see the device and "bl_power" is activated.​
     
  6. waltervl

    waltervl UDOOer

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    On the risk of telling something completely stupid:
    According this page there is a kernel start-up parameter in 3.14.
    consoleblank= [KNL] The console blank (screen saver) timeout in
    seconds. Defaults to 10*60 = 10mins. A value of 0
    disables the blank timer.

    I hope it helps you. And I am sorry if I brought you deeper into trouble :)
     
    patrykk likes this.
  7. Teleco88

    Teleco88 New Member

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    You are right!That was indeed what happened.
    Thanks!!
     
    Andrea Rovai and waltervl like this.

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