> > I was looking through the patches and saw a date of August 14 on the > > cx23885 to vb2 patch and thought that could have been around when it > > started breaking, but then the > > 73d8102298719863d54264f62521362487f84256 is dated September 3 and I'm > > pretty sure it had started playing up before then. About what date > > would I have seen the 453afdd9ce33293f640e84dc17e5f366701516e8 > > "cx23885: convert to vb2" patch? > > That patch was merged in the master branch September 8. > > If you've seen it earlier, then it may not be related to vb2 after all. > I'd say not. > If it is polling related, then it might be commit > 9241650d62f79a3da01f1d5e8ebd195083330b75 > (Don't return POLLERR during transient buffer underruns) which was added > to > the master branch on July 17th and was merged for 3.17. Or it could be > something entirely different. > > You could try reverting that commit and see if that helps. That sounds plausible wrt timeframe, but if cx23885 only started using vb2 after Sept 8 then it couldn't have affected me before then right? > > In any case it should be easy enough to revert and build so I'll do > > that tomorrow once I can prove it still fails with the current > > regression patch applied. > > Which patch are you using? There have been several versions posted. This > is the one you should use: > > https://patchwork.linuxtv.org/patch/25992/ > That's the one I applied - you can even see my questions below in that link :) Based on what you have said I think that's not going to solve anything for me though. So I guess my plan is: . Revert to 73d8102298719863d54264f62521362487f84256 and test (not likely to fix but easy to test) . Revert to sometime around June when I submitted my patch for Fusion Dual Express 2 driver when I know it was reliable and test Other possibilities are: . MythTV bug . Defective card Time to google a command line dvb stream to rule out mythtv I guess... Thanks James ��.n��������+%������w��{.n�����{��g����^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�