I've just installed gnome boxes into a virtual machine and checked by groups both before and after, and I'm not a member of the kvm group, despite being in the sudo group.
I can't do much more testing right now, but from my understanding of the issue when I raised it about 6 months ago, my guess would be that the logic isn't working.
I had to manually add myself to the kvm group to make gnome-boxes work.
I've just installed gnome boxes into a virtual machine and checked by groups both before and after, and I'm not a member of the kvm group, despite being in the sudo group.
I can't do much more testing right now, but from my understanding of the issue when I raised it about 6 months ago, my guess would be that the logic isn't working.
I had to manually add myself to the kvm group to make gnome-boxes work.