Comment 342 for bug 1887190

Thank you everyone for fixing this, I've been following this thread for the last few weeks and today is the first time I've managed to get it working.

For any noobs like me that are on Ubuntu this is the guide that I followed to upgrade to kernel 5.11 and everything works perfectly for me, both the touchpad and the brightness controls.

Upgrade kernel

    Change current directory to /tmp
    cd /tmp

    Download the latest mainline kernel from 5.11.x branch by copying and pasting this:

    wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.11-rc2/amd64/linux-headers-5.11.0-051100rc2_5.11.0-051100rc2.202101032030_all.deb
    wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.11-rc2/amd64/linux-headers-5.11.0-051100rc2-generic_5.11.0-051100rc2.202101032030_amd64.deb
    wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.11-rc2/amd64/linux-image-unsigned-5.11.0-051100rc2-generic_5.11.0-051100rc2.202101032030_amd64.deb
    wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.11-rc2/amd64/linux-modules-5.11.0-051100rc2-generic_5.11.0-051100rc2.202101032030_amd64.deb

Install new kernel
sudo dpkg -i *.deb

Reboot the system
sudo shutdown -r now

    Update packages list
    sudo apt-get update

    Upgrade packages
    sudo apt-get upgrade

    Reboot the system if needed
    sudo shutdown -r now

    Check the OS distro
    lsb_release -a

    Check kernel version
    uname -r

That's it, now you should be running on the Linux Kernel 5.11rc2

Guide taken from this wonderful page:
https://sypalo.com/how-to-upgrade-ubuntu

Thanks to everyone for their hard work, sorry for posting this noob guide here but it took me weeks to figure out an easy way to do it (patching was beyond my abilities).