[ Quoting <m...@miek.nl> in "Bug#920937: Also with 20190502-1..." ]
I'm seeing the same problem even with version 20190502-1 firmware-atheros.
I've downgraded to the version supplied with stretch, but that didn't help either.
I'm now running kernel 5.2.3 (ubuntu ppa) and this seems to have made some kind of difference.
