[NO LONGER NECESSARY] MATRIX Kernel Modules <> Linux Kernel 5.4 Issue > Downgrade to 4.19

UPDATE: This issue has now been resolved. In order to undo the Linux kernel downgrade from below, please run these commands one by one.

sudo apt-mark unhold raspberrypi-kernel

sudo apt-mark unhold raspberrypi-kernel-headers

sudo apt purge matrixio-kernel-modules

sudo apt purge raspberrypi-kernel-headers

sudo apt update && sudo apt upgrade

sudo reboot

sudo apt install matrixio-kernel-modules

sudo reboot

Hey all,

If you’re having issues with the MATRIX kernel modules due to incompatibilities with the latest Linux kernel 5.4, I would recommend following the steps below to temporarily downgrade to Linux kernel 4.19.118.

cd ~/

wget -q --show-progress -O "rpi_kernel_4-19.deb"  http://archive.raspberrypi.org/debian/pool/main/r/raspberrypi-firmware/raspberrypi-kernel_1.20200512-2_armhf.deb

wget -q --show-progress -O "rpi_kernel_headers_4-19.deb" http://archive.raspberrypi.org/debian/pool/main/r/raspberrypi-firmware/raspberrypi-kernel-headers_1.20200512-2_armhf.deb

sudo apt purge raspberrypi-kernel-headers

sudo apt install ./rpi_kernel_4-19.deb

sudo apt install ./rpi_kernel_headers_4-19.deb

sudo apt-mark hold raspberrypi-kernel

sudo apt-mark hold raspberrypi-kernel-headers

sudo reboot

Then, to install the MATRIX kernel modules, follow the steps here.

Our engineers are making progress with updating the MATRIX kernel modules to work with Linux kernel 5.4 and we will let you know when it is good to go.

Thanks for your patience and let us know if you have any questions.

Best,
Samreen

I think it would make sense to write it in your documentation. At least until your guys fix it

1 Like

@leo,

Great recommendation, I completely forgot about that!

I will remember for next time. Fortunately, the problem should be fixed now!

I am updating my original post to reflect this and steps to undo the kernel downgrade.

Best,
Samreen