Will try atalk tomorrow.
Conversations is working fine with both Chatty and pidgin, after the updates suggested by Andrea.
outside of my own server where offline messages are all directed to MAM, which is incompatible with Pidgin/Chatty, I’ve tried another public server, and Chatty was able to receive offline messages, even with OMEMO.
As it is, Pureos on the L5 (qemu image) does NOT have notifications it seems, and chatty is not running at boot, so no messages are coming in until chatty is manually launched. On the other hand, I’m pretty sure Pureos doesn’t kill tasks in the bg like iOs and Android do, because when I switch away to a browser on the L5, send messages to Chatty, and come back, the messages are already there.