Should be a duplicate of bug 1865962, which was currently only fixed in 5.4.0-18 or newer in Focal. Is it possible for you to try Focal kernel?
$ echo deb http://archive.ubuntu.com/ubuntu/ focal | \ sudo tee /etc/apt/sources.list.d/focal.list $ sudo apt update && sudo apt install linux-modules-extra-5.4.0-21-generic/focal
Should be a duplicate of bug 1865962, which was currently only fixed in 5.4.0-18 or newer in Focal. Is it possible for you to try Focal kernel?
$ echo deb http:// archive. ubuntu. com/ubuntu/ focal | \ sources. list.d/ focal.list extra-5. 4.0-21- generic/ focal
sudo tee /etc/apt/
$ sudo apt update && sudo apt install linux-modules-