NextPVR Forums

I have a Diamond ATI TV Wonder HD750 USB stick. I use both analog and digital channels but when an analog show is immediately followed by a digital show, I get "Device failed to start". I assume that this device actually has only 1 tuner but NPVR sees them as separate devices. How can I make this work? Log files attached.

Thanks

Given the lack of "dual tuner" sales pitch on AMD/ATI's website, I'd say that it is indeed a single tuner supporting multiple protocols. For all purposes that tuner presents itself has two different hardware devices (one for analog tuning, and another for digital tuning).

Add the following to the DeviceRules.xml file:

Then restart the recording service.

What really caught my eye was this in the NRecord log, since the Diamond ATI TV Wonder HD 750 USB obviously has only one digital tuner:


There's an old thread involving this tuner in which whurlston interpreted the CQAM "device" as a non-standard driver (presumably for TotalMedia): http://forums.nextpvr.com/showthread.php...lem-thread

Speaking of drivers, someone on another website recommends this one for the TV Wonder HD 750 with Windows 7: http://support.amd.com/us/gpudownload/wi...%20Edition

BTW the NPVR log shows that you have not installed the prerequisite DirectX end-user runtimes: http://www.nextpvr.com/nwiki/pmwiki.php?...requisites

Thanks. I'll test it when I get a chance. BTW the link to DirectX 9.0c Runtime is not working.

Someone must have fixed the link because it's working now. Were you able to implement johnsonx42's recommendation using Notepad? Do you still get "device failed to start" when changing from analog to QAM?

I ran a test last night and still have the same error. What did I do wrong? Logs attached.

Thank You

BTW the link still doesn't work for me in IE10. Works in chrome!

Looks like the mysterious CQAM "device" is no longer enabled, which should be a good thing. I do see a case where a recording failed to start because an analog recording wasn't quite finished:


I have no analog channels and don't do a lot of recording, so I'm probably not the best one to help you with this problem. I thought NextPVR was supposed to disregard padding if it would cause a recording to fail, but that might not work with your single-tuner ATI HD750. My only suggestion is to use no padding for recordings, maybe even set them to end a little early. Of course a dual tuner would be a good solution, but you should be reluctant to invest in analog hardware because your cable provider will go all-digital one of these days. Did you try the driver? You can always roll back if it makes things worse.

I believe the processing of DeviceRules.xml no longer works properly (or perhaps never did). I can't get it to work on my system either. I think it works for scheduling, as I never find that NPVR has scheduled the same tuner on my HVR-2250 to record both analog and digital at the same time, but it doesn't seem to work when starting livetv or for other "on-the-fly" situations like padding. Luckily in my case all that happens is that one tuner fails to start so NPVR just fails down the list until it finds one that works..

With just the one hybrid tuner, you're going to run into this situation all the time. For now you should be able to avoid the problem most of the time by disabling pre- and post- padding.

We're in testing on the next version of NPVR, so I'll try to come up with some repeatable tests for sub so he can fix it before the next release.

sub, here's another example of what I'm talking about:

I started a recording on the first digital tuner of my HVR-2250, then requested live tv on an analog channel. NPVR tried to use the first analog tuner of the HVR-2250, because in this scenario it doesn't seem to process the DeviceRules.xml correctly. It failed to start the tuner, so then it looked for another tuner and started livetv on the second HVR-2250 tuner.

I'll be happy to test fixes for this during pre-release testing.