clevo P651HS-G screen brightness in MsHybrid mode

Discussion in 'Linux Compatibility and Software' started by DeadLink404, Apr 1, 2018.

  1. DeadLink404

    DeadLink404 Newbie

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    I am trying to install Arch Linux on my xmg p507.
    The screen brightness seems to be controlled by the dGPU. And the nouveau drivers seem incapabale of controlling screen brightness. The only fully working config I got was using discrete mode with nvidia drivers.
    Ideally I would like to use bumblebee to turn off the nvidia card most of the time. I do not think I'll game on linux.
    Another solution would be using PRIME but that won't work unless the nouveau drivers play ball.

    Has anybody had any success with using optimus on this machine on linux (with screen brightness control).

    For anyone who is going to try, if lspci lockups the arch wiki has a workaround.
    acpi_osi="!Windows 2015" has worked for me.
     
  2. Txordi

    Txordi Notebook Consultant

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    I do not recommend you to use Bumblebee since it lost the developer support as far as I know. What I currently do is to use the official nvidia drivers from the "graphics-drivers" PPA. For me, in an MSI GT70 with ubuntu 16.04 (paired with an 980M) a simple apt-get installation is enough to have them working as intended. Then, in order to save battery and avoid some annoying tearing I set the Intel mode in nvidia-settings.

    So far is the simplest and "more official" way to work with nvidia proprietary drivers while keeping all the rest untweaked that I found...

    Sent from my SM-G900F using Tapatalk

    I don't know much about ArchLinux and I have not enough knowledge to make a guess here... Sorry about that. Hope it comes for you as easy as in my Ubuntu ;)

    Sent from my SM-G900F using Tapatalk
     
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  3. DeadLink404

    DeadLink404 Newbie

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    If I enable MsHybrid mode it registers the intel backlight interface which tries to control the brightness, but does nothing.
    The controls so far have only worked in discrete mode and nvidia drivers.
     
    Last edited: Apr 2, 2018
  4. DeadLink404

    DeadLink404 Newbie

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    I found the solution.
    I needed to add the kernel parameter i915.enable_dpcd_backlight=1
    With this the integrated eDP TN panel gets set over aux not PWM or something like that.
     
  5. Dennismungai

    Dennismungai Notebook Evangelist

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    Perhaps this might solve the issue I'm having with the Asus GM501GS-XS74. Will report back.
     
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