On Fri, Apr 21, 2017 at 7:57 AM, Steven Toth <stoth@xxxxxxxxxxxxxx> wrote: >> Just a follow up on this. I had a bit more time to dig deeper into this today. >> >> Enabling debug output for the cx23885 driver *fixes* the issue. >> >> I added this to my kernel command line: cx23885.debug=8 > > The driver's been around a very long time and is very stable with > almost anything anyone has every added, or I originally added during > the early development. That being said..... this sounds like the quad > is producing some kind of race condition, or the PLX bridge is in > someway not as transparent as everyone would like. I happen to have tip installed on a dev box, so I thought I'd install a quad-hd and test for the issues you'd mentioned. I do not see any of the issues you are describing, regardless of whether I tested with w_scan, tzap, dvbtraffic. No unusual module options used, everything 'default'. Everything looks fine to me, no fault found, Ubuntu 16.04 Kernel 4.12-rc1, 64bit. -- Steven Toth - Kernel Labs http://www.kernellabs.com