what tuner do you use ? (pls test also Generic x86_64, ver. 8.0.0, kernel 4.8.13, with media_build - tx!! smp)
We are currently suspecting that some usb change made it worse then in 4.8, but still didn't found a solution.
I'm using the DVBSky S960 USB DVB-S2 adapter.
BTW I had also posted here: thread-4878.html and tried the various test builds with the 4.9 kernel which you sent me last week...
I shall test with Generic x86_64, ver. 8.0.0, kernel 4.8.13, with media_build later today or tomorrow and report back.