I upgraded my laptop yesterday to 18.4.1 and I am now unable to connect my Sony a6300 camera via USB/MTP. The camera tries to connect but immediately goes into battery charge mode instead of allowing me to do file transfers. Battery on the camera is fully charged and the camera connects successfully on my desktop P.C. (which is running 14.4) but will not connect to the 18.4.1 laptop.
uname results: 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:39:52 UTC 2018 x86_64.
dpkg -l | grep mtp results: ii libmtp-common 1.1.13-1 all ii libmtp-runtime 1.1.13-1 amd64 ii libmtp9:amd64 1.1.13-1 amd64 ii libnet-smtp-ssl-perl 1.04-1 all ii mtp-tools 1.1.13-1 amd64