Comment 47 for bug 1792085

I have just tried installing libmtp-1.1.17-2 on 18.04 from here:
https://launchpad.net/ubuntu/+source/libmtp/1.1.17-2/+build/18694144
files:
libmtp-common_1.1.17-2_all.deb
libmtp-runtime_1.1.17-2_amd64.deb
libmtp9_1.1.17-2_amd64.deb
(disconnect phone and after installation log out and log in back to the system or reboot for new libraries to be loaded)
Now listing files is quick and I can actually transfer files.