[SOLVED] Raspbian bug kills Moitessier HAT systems after upgrading to kernel 4.19.118

[serh11]

yes, but still far away from USB Boot.

There is always an option to build the driver for kernel 5.x from sources...
Something like this:
git clone https://github.com/mr-rooney/moitessier.git
cd moitessier
git submodule update --init --recursive
cd modules/moitessier
make all KDIR=/lib/modules/4.19.118-v7l+/build/
This needs to be adjusted for your kernel version, and it needs kernel headers installed and there might be other dependencies.
Of course there is a risk of incompatibility with another version of kernel, but this is another story...
If everything goes well with kernel module, then you'll need a set of userspace applications for your kernel version, I suspect that symbolic links to 4.19.118 versions of applications would be just fine, but if not, then they can be bluit in a similar way to the kernel module...