My test computer is an Ubuntu server, on which this issue only occurs on resume from suspend. Normally this computer is not suspended, which is why I did not notice the issue until now. Kernel 4.8 is good, kernel 4.9-rc1 is bad. I've started a kernel bisection. It'll take a couple of days.
My test computer is an Ubuntu server, on which this issue only occurs on resume from suspend. Normally this computer is not suspended, which is why I did not notice the issue until now. Kernel 4.8 is good, kernel 4.9-rc1 is bad. I've started a kernel bisection. It'll take a couple of days.