I seem to be unable to get the dongle running and connecting properly to a 5 ghz network. In the kernel log I found some error notifications apparently concerning mt7610u, but I am unable to make sense of them. Some logs are here:
I tried moving it to /lib/firmware/mt7610u_sta.dat and removing /var/lib/connman/wifi* again. After rebooting the osmc wifi config tool showed only 5 ghz networks and managed to connect to my 5 ghz network. But again, there was no working connection.
I can only confirm that the router is set to wpa2 but I couldn’t find out anything about the encryption method. As the router is fairly new (a German Telekom Speedport Smart with rather good WiFi, but a pretty poor user interface and documentation) I would expect it to use aes encryption. Also, I never had any issues with other linux systems, as long as I had the correct driver installed.
I would stick with the wired connection, I’m inclined to suspect the router is either presenting encryption as tkip/aes or tkip. If this is the case I think it will be a hard to get a 5ghz connection, unless this can be changed to aes only:
just to give some kind of a final feedback: In the meantime, I got my dLAN 1200+ WiFi ac and could establish a stable wired connection (even though it’s dlan). I tried to use the 5ghz wifi provided by the dlan device and it seemed to be stable.
Anyway, I’ll stick to the wired solution, of course.