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I'm running Debian 10 on an i9-9900k on a Gigabyte Aorus Pro motherboard (using the integrated Intel graphics chipset) and an nVIDIA RTX 2080Ti graphics card. I have two monitors. I want to have monitor B working with the nVIDIA card and monitor A with the Intel integrated chipset. The problem is that only monitor B is working now. Monitor A is turned off. Maybe there is something bad with the secondary graphic card, because Debian disables the card that's not the most important. I want to enable it. Someone told me that the kernel that I'm using (4.19) is old and it does not support the Intel chipset of the motherboard. I would like to update it, but I don't know how to do that. He said also that it is in the backports. So a couple of lines should be enough. I tried to compile a new kernel from scratch, version 5.3.2, using the default settings, but it didn't work, in fact it freezes during boot. So, my question is: how can I easily upgrade the Debian 10 kernel, from 4.19 at least to a version that allows me to enable the Intel chipset and also firmware-misc-nonfree?

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Adapting my Debian 9 answer to Debian 10:

  • enable backports:

    echo deb http://deb.debian.org/debian buster-backports main contrib non-free | sudo tee /etc/apt/sources.list.d/buster-backports.list
sudo apt update

  • install the backported kernel:

    sudo apt install -t buster-backports linux-image-amd64

    (the new kernel will be installed alongside your current kernel, so you can always boot the latter if things go wrong)

  • install the firmware:

    sudo apt install -t buster-backports firmware-linux

As of this writing, this will install version 5.7.10 of the kernel, with the firmware from August 2020.

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  • Is installing firmware-linux necessary? And regardless of answer, how to install firmware for new kernel without contrib and non-free in apt sources?
    – metablaster
    Commented Feb 14 at 14:35
  • @metablaster are you using Debian 10?
    – Stephen Kitt
    Commented Feb 14 at 14:56
  • I'm on Debian 12 (12.4) should I ask a new question?
    – metablaster
    Commented Feb 14 at 16:24
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    @metablaster you already know how to install packaged from backports on Debian 12, installing a backported kernel is the same; you can’t install backported firmware because there is none.
    – Stephen Kitt
    Commented Feb 14 at 16:38
  • thank you I understand, but if there were backported firmware would that be necessary to install for the new kernel to function properly? and I suppose it should be possible without contrib and non-free firmware in that case? reason I'm asking this is because you included the command in your answer here.
    – metablaster
    Commented Feb 14 at 17:02

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