Sundtek Support Forum

Alright, same problem as you already thought. What info do you need to file a bug report?

The complete controllers are forwarded to my tv server VM using PCI-passthrough, so that shouldn't be an issue...

Motherboard is Supermicro http://www.supermicro.com/products/motherboard/xeon/c202_c204/x9scm-f.cfm equipped with Intel Xeon E3-1230V2

Something else to try?

Just thinking, is there maybe a problem with two identical tuners on the same system? Maybe that messes up the driver?

Ok I'll try isochronous mode and will report back to you.

I'm not sure if this is related to the USB 3.0 bug that is described in this bugzilla report https://bugzilla.kernel.org/show_bug.cgi?id=75521

I'm using the following setup:

• 2x MediaTV Pro III
• 1x Digital Home http://ecx.images-amazon.com/images/I/41QsVyeH1sL._SS400_.jpg
• 1x Startech USB 3.0 controller http://www.startech.com/Cards-Adapters/USB-3.0/Cards/2-Port-PCI-Express-SuperSpeed-USB-3-Card-Adapter~PEXUSB3S2
• 1x Startech USB 3.0 controller http://www.startech.com/Cards-Adapters/USB-3.0/Cards/2-port-PCI-Express-USB-3-Card~PEXUSB3S25
• Tvheadend 3.9.2656~g0d4f443
• CentOS 7
• Latest and greatest Sundtek drivers
• DVB-C on Ziggo

Because of the known USB 3.0 bug, I enter https://bugzilla.kernel.org/show_bug.cgi?id=75521#c28 this line before starting tvheadend and I do this for all three tuners.

After using tvheadend a while, the MediaTV Pro tuners stop working and tvheadend reports "scan no data, failed". The Digital Home tuner however keeps working. After a reboot of CentOS the whole setup works again for a while.

So now the question; is this behaviour to be expected, keeping the USB 3.0 bug in mind? Is there a logical explanation for the fact the Digital Home tuner keeps working?  

Is there any news for this issue? Bug is present very long 

For feedback, did some further investigation and it turns out the Tvheadend stable version doesn't have this issue. So, it's Tvheadend. Thanks for your help!

I don't have a sundtek.conf file.