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  • 4DPi-35 brightness setting stop working

    Hello,

    I'm working on a project using a Raspberry Pi 1 model B, some sensors connected its i2c bus and a 4DPi-35 screen. When I turn on the RPi at first the brightness setting works fine, I just echo any value from 0 to 255 and the screen brightness changes accordingly. But after a while something happens (I haven't been able to figure out what) and regardless of what value I put in the brightness file the screen goes to full brightness and there it stays (even if I put 0). When that happen a reboot of the RPi is not enough, I have to halt it, disconnect and reconnect the power and only then it starts working again for a while. I'm using raspbian as distro, still on wheezy. And I've installed this kernel: http://www.4dsystems.com.au/download..._1.3-1_pi1.deb

    Is there anything I could try? Or more information I can give?

    Thanks in advance!

  • #2
    Hello robyf,

    Haven't heard of this before, but maybe you would like to try the latest release of the kernel, rather than what you are using currently?

    http://www.4dsystems.com.au/download...10_v1.0.tar.gz

    which is detailed in the current datasheet:

    http://www.4dsystems.com.au/productp...heet_R_1_4.pdf

    I hope that helps

    Regards
    James

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    • #3
      Hello James,

      Will try that. I didn't notice a newer version came out. One thing, the kernel packaging is now completely different, how would you recommend to proceed? Uninstall the .deb , reboot, install the new one?

      Br,
      -Roberto

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      • #4
        Hi Roberto,

        Ideally start with a new image if you can, but if not, yep you could try to remove the deb and install the new package. Unsure what the effect will be if you upgrade your existing install, but since its using a new kernel it might work fine.

        Regards
        James

        Comment


        • #5
          Hi James,

          I've tested using the latest kernel on a fresh Raspbian Jessie image and I haven't been facing the issue so far.

          Thanks for the support.

          Br,
          -Roberto

          Comment

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