Sharing a path between Mint KVM host and MX Linux KVM guest

[mushishi]

First of all this is the software I am using:

Code: Select all

$ apt show virt-manager
Package: virt-manager
Version: 1:2.2.1-3ubuntu2.1
...

Mint is 20.2, MX is 19.4 . I tried to share a folder from my $HOME with the guest, but despite trying to add my user to the groups kvm, libvirt-qemu and libvirt and changing user+group permissions of the $HOME subfolder, I got permission denied errors. Similar to these:
https://github.com/virt-manager/virt-bootstrap/issues/6

I worked around this problem, let's call it (*), by creating a path on /mnt with sufficient permissions and sync the contents via Unision. If anyone has a better idea, I am open to suggestions.
However my real problem, let's call it (**), is that the filesystem mount does not work. I followed the following how-to:
https://cialu.net/qemu-kvm-on-ubuntu-an ... nd-guests/

Except that I pick the "mount" mode instead of "squash". Unfortunately, neither option works, as I cannot see any files on the guest. I am also surprised not to see the path "/vmshare" on my guest. Any tips?