Hello !
To try convergence on my FP2 I bought a HDMI wireless dongle with a button to switch between two modes: Miracast and DLNA.
I plugged it on a TV, connected my UbuntuTouch FP2 device to it remotely. The dongle appeared in the available external displays. Once selected, the screen on the TV became black (instead of the dongle's welcome screen) and the screen on my FP2 grey with a message "you can use this touchscreen as a pointer".
Waiting a couple minutes didn't change anything, the TV screen remained desperately black...
What is funny it that I decided to take a screenshot (vol +& vol -) and once back in the "smartphone mode", I opened it: the image show the desktop of a big screen, with my UT apps displayed! So somehow UbuntuTouch was able to switch to "convergence mode" but not to correctly send the signal to the dongle...
How can I debug this?
Best regards,
Olivier
Note: I didn't connected any wireless mouse/keyboard, is it necessary?
Note2: I tested both Miracast and DLNA screencasting on LineageOS and it worked, so the dongle is not defect.