audacity 2.4.1 won't recognise focusrite scarlett solo on ubuntu 18.04.3

Audacity Help Forum GNU/Linux
1

i recently updated to audacity 2.4.1 on ubuntu 18.04.3 and i can not get my focusrite scarlett solo to work at all…
it did work when i was on audacity 2.2 (same ubuntu)
any ideas? is this a ‘bug’ do i have to install additional drivers ?
tnx

2

Perhaps related to this: https://forum.audacityteam.org/t/ubuntu-mint-audacity-2-4-1-ppa-problem/57517/1