by tzimmo » Tue Jun 27, 2017 5:42 pm
I'm experiencing the same issue. I have two systems and using DVB-T/DVB-T2:
1) Asus M4A88T-M with TBS6284 quad tuner. Current setup: adapter0=idle, adapter1=hd, adapter2=sd, adapter3=hd. There are no problems with it, no continuity counter errors.
2) Asus M4A89GTD-PRO with 2x TBS284 quad tuner and because of the current issues also Hauppauge WinTV Nova-T(D) 500 PCI dual tuner. Current setup: adapter0=hd, adapter1=idle, adapter2=idle, adapter3=idle, adapter4=hd, adpater5=sd, adapter6=sd, adapter7=sd, adapter8(nova)=sd, adapter9(nova)=sd.
On the second system, you maybe noticed that I am using only one out of 4 tuners on the card. Previously that channel was DVB-T (SD) and there were no issues whatsoever. But about a month ago that multiplex was changed to DVB-T2 (HD) and the problems started. I'm only able to use one tuner out of 4 to get uncorrupted TS stream. If I use any of the other 3 tuners, I'm starting to get continuity errors and they look exactly like described here. There are corrupted packets that are out of sequence, probably partial copies of some previous packets as when I compare the recordings between system 1 and system 2, system 2 produces slightly larger output files per program, like 188, 376 or 564 bytes larger per hour. Removing those extraneous duplicate/corrupted packets seem to generate at least sometimes a fully working, identical stream to what system 1 gets (where there is no issue for some reason). I haven't yet tried switching to MSI interrupts or trying to see if there are any power saving settings in BIOS that I could try to disable. As I have two adapters in system 2, I have tried to move that multiplex (UHF, 618 MHz) to the other card, i.e., adapter numbers 4-7, but exactly the same issue happens there: that frequency has to be the only one tuned there or the stream gets corrupted.
For some reason the other DVB-T2 multiplex (VHF, 184.5 MHz) does not suffer from this issue but it can be stored while the other 3 tuners are also storing full stream, as long as I don't tune that problematic 618 MHz frequency to the other tuners on the same adapter. However, even if I have both HD streams on the same adapter, it only corrupts this 618 MHz frequency, 184.5 MHz has no continuity issues.
Any ideas how I could further debug the issue to maybe help resolving an issue in the driver (or in the HW)? I guess the manufacturer has been running stress tests on their adapters, receiving 4x high bandwidth HD channels at the same time and checking the continuity counters for each PID?