On Thu, Oct 10, 2019 at 11:14 PM David Ho <davidkwho@xxxxxxxxx> wrote: > > Hi Dan, Steve, > > The issue was fixed by booting the latest 5.0.x upstream kernel !!! I > guess this has something to do with 5.0.0 and seems to have been fixed > since then. It appears I put too much faith in an LTS kernel... > > $ uname -a > Linux mumble15 5.0.21-050021-generic #201906040731 SMP Tue Jun 4 > 07:33:07 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Did you also updated to corresponding linux-firmware, that might have solved the problem?